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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_C90ABA2D7A67AAA7E75106EE4CA69D7F_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_C90ABA2D7A67AAA7E75106EE4CA69D7F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other non-current liabilities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_C90ABA2D7A67AAA7E75106EE4CA69D7F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_7BDD91D36F859814221306EE4CA7B0C8_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_7BDD91D36F859814221306EE4CA7B0C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7BDD91D36F859814221306EE4CA7B0C8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForConstructionInProcess_3DCE2DEE1686DF93B31306EE4CA74A50_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForConstructionInProcess_3DCE2DEE1686DF93B31306EE4CA74A50" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Second-generation network costs (including interest)</link:label>
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    <link:label id="lab_us-gaap_PaymentOfFinancingAndStockIssuanceCosts_17F56D1F4AA3DD211DC206EE4CAFDC0E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentOfFinancingAndStockIssuanceCosts_17F56D1F4AA3DD211DC206EE4CAFDC0E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments for financing costs</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentOfFinancingAndStockIssuanceCosts" xlink:label="loc_us-gaap_PaymentOfFinancingAndStockIssuanceCosts_17F56D1F4AA3DD211DC206EE4CAFDC0E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_8F1DCA9BF9C44FCDBE8C06EE4CB0A3C5_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_8F1DCA9BF9C44FCDBE8C06EE4CB0A3C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Private Placement</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_8F1DCA9BF9C44FCDBE8C06EE4CB0A3C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_8F1DCA9BF9C44FCDBE8C06EE4CB0A3C5" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfPrivatePlacement_8F1DCA9BF9C44FCDBE8C06EE4CB0A3C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of common stock and exercise of options and warrants</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance or Sale of Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF" xlink:to="lab_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_70695EE0C655F7CF675C06EE4CB0A0FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_DF14406932F285C9CEE006EE4CB19A26_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_DF14406932F285C9CEE006EE4CB19A26" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_DF14406932F285C9CEE006EE4CB19A26_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_DF14406932F285C9CEE006EE4CB19A26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_DF14406932F285C9CEE006EE4CB19A26" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7DEF8AE6A922CD2E808006EE4CB1CC80_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7DEF8AE6A922CD2E808006EE4CB1CC80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effect of exchange rate changes on cash, cash equivalents and restricted cash</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7DEF8AE6A922CD2E808006EE4CB1CC80" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_09D530774E5337E4644906EE4CB24E6E_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_09D530774E5337E4644906EE4CB24E6E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_09D530774E5337E4644906EE4CB24E6E_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_09D530774E5337E4644906EE4CB24E6E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_09D530774E5337E4644906EE4CB24E6E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_A8BED5A8BC1AD033149106EE4CB2557B_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_A8BED5A8BC1AD033149106EE4CB2557B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_A8BED5A8BC1AD033149106EE4CB2557B" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_27BDE8BA4243A186C93A06EE4CB2C6D0" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAbstract_5AE8518828004C41FA7E06EE4CB2A76F_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAbstract_5AE8518828004C41FA7E06EE4CB2A76F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of cash, cash equivalents and restricted cash</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAbstract_5AE8518828004C41FA7E06EE4CB2A76F_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAbstract_5AE8518828004C41FA7E06EE4CB2A76F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAbstract" xlink:label="loc_us-gaap_CashAndCashEquivalentsAbstract_5AE8518828004C41FA7E06EE4CB2A76F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_1D62A1F1BF84B64E0F4D06EE4CB30C14_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_1D62A1F1BF84B64E0F4D06EE4CB30C14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_1D62A1F1BF84B64E0F4D06EE4CB30C14_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_1D62A1F1BF84B64E0F4D06EE4CB30C14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1D62A1F1BF84B64E0F4D06EE4CB30C14" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RestrictedCash_AF0D226BF5A2FF4110D706EE4CB4A84D_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash_AF0D226BF5A2FF4110D706EE4CB4A84D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash (See Note 5 for further discussion on restrictions)</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_AF0D226BF5A2FF4110D706EE4CB4A84D_label_en-US" xlink:label="lab_us-gaap_RestrictedCash_AF0D226BF5A2FF4110D706EE4CB4A84D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCash" xlink:label="loc_us-gaap_RestrictedCash_AF0D226BF5A2FF4110D706EE4CB4A84D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_351285A91377C13B44FC06EE4CB4C6E6_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_351285A91377C13B44FC06EE4CB4C6E6" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash, cash equivalents and restricted cash shown in the statement of cash flows</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_351285A91377C13B44FC06EE4CB4C6E6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_AFE7A4BF161E3F7735BE06EE4CB49F33_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_AFE7A4BF161E3F7735BE06EE4CB49F33" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental disclosure of cash flow information:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_AFE7A4BF161E3F7735BE06EE4CB49F33" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ClassOfStockDomain_2A08D9D107D624E86F6E10E2B6CA300C_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_2A08D9D107D624E86F6E10E2B6CA300C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
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    <link:label id="lab_us-gaap_SeriesAPreferredStockMember_F31A38EDC2EC808648C310E2B6CA375E_label_en-US" xlink:label="lab_us-gaap_SeriesAPreferredStockMember_F31A38EDC2EC808648C310E2B6CA375E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series A Preferred Stock [Member]</link:label>
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    <link:label id="lab_us-gaap_CommonStockMember_05A540894A2DCF0286E810E2B6CB3926_label_en-US" xlink:label="lab_us-gaap_CommonStockMember_05A540894A2DCF0286E810E2B6CB3926" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
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    <link:label id="lab_us-gaap_StatementLineItems_895CF8E77454E48345F010E2B6CB0105_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_895CF8E77454E48345F010E2B6CB0105" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
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    <link:label id="lab_us-gaap_AssetsAbstract_10CE62281082B38252D710E2B6CBFB3C_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_10CE62281082B38252D710E2B6CBFB3C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrentAbstract_0219D934A28281A1044210E2B6CCB10E_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_0219D934A28281A1044210E2B6CCB10E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current [Abstract]</link:label>
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    <link:label id="lab_us-gaap_RestrictedCashCurrent_539FC19E331AF81E64B110E2B6CCA5E3_label_en-US" xlink:label="lab_us-gaap_RestrictedCashCurrent_539FC19E331AF81E64B110E2B6CCA5E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash, Current</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CustomerAdvancesAndDeposits" xlink:label="loc_us-gaap_CustomerAdvancesAndDeposits_DD51276393FE6785AB2506EE47E0DB47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustomerAdvancesAndDeposits_DD51276393FE6785AB2506EE47E0DB47" xlink:to="lab_us-gaap_CustomerAdvancesAndDeposits_DD51276393FE6785AB2506EE47E0DB47" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued professional and other service provider fees</link:label>
    <link:label id="lab_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6_label_en-US" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Professional Fees, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6" xlink:to="lab_us-gaap_AccruedProfessionalFeesCurrent_A2A790655DF36A5A9B5106EE47E174C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued commissions</link:label>
    <link:label id="lab_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224_label_en-US" xlink:label="lab_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Sales Commission, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedSalesCommissionCurrent" xlink:label="loc_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224" xlink:to="lab_us-gaap_AccruedSalesCommissionCurrent_82FACAD9CEA3C8A1F77006EE47E1C224" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued telecommunications expenses</link:label>
    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F_label_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Accrued Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F" xlink:to="lab_us-gaap_OtherAccruedLiabilitiesCurrent_9C57F9F0C4FE66D4390606EE47E2DE5F" xlink:type="arc" />
    <link:label id="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC_terseLabel_en-US" xlink:label="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued satellite and ground costs</link:label>
    <link:label id="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC_label_en-US" xlink:label="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Contract Cost</link:label>
    <link:label id="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC_documentation_en-US" xlink:label="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contract-related amounts legally owed for which no invoice has been received.</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_AccruedContractCost" xlink:label="loc_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:to="lab_gsat_AccruedContractCost_48CCE8528101DC25274906EE47E2E3EC" xlink:type="arc" />
    <link:label id="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5_terseLabel_en-US" xlink:label="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued inventory</link:label>
    <link:label id="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5_label_en-US" xlink:label="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Inventory In Transit, Current</link:label>
    <link:label id="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5_documentation_en-US" xlink:label="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accrued Inventory In Transit, Current</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_AccruedInventoryInTransitCurrent" xlink:label="loc_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:to="lab_gsat_AccruedInventoryInTransitCurrent_C5920AC8C33B179667D806EE47E370C5" xlink:type="arc" />
    <link:label id="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627_terseLabel_en-US" xlink:label="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued asset purchase (See Note 8 for further discussion)</link:label>
    <link:label id="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627_label_en-US" xlink:label="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Asset Purchase</link:label>
    <link:label id="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627_documentation_en-US" xlink:label="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accrued Asset Purchase</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_AccruedAssetPurchase" xlink:label="loc_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:to="lab_gsat_AccruedAssetPurchase_2888E96F4FE65114371B06EE47E3F627" xlink:type="arc" />
    <link:label id="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725_terseLabel_en-US" xlink:label="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other accrued expenses</link:label>
    <link:label id="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725_label_en-US" xlink:label="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Accrued Expenses</link:label>
    <link:label id="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725_documentation_en-US" xlink:label="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Accrued Expenses</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_OtherAccruedExpenses" xlink:label="loc_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:to="lab_gsat_OtherAccruedExpenses_12A22701EC0A49B6E88E06EE47E37725" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_9A71DFD8E7313615851706EE47E37BBE_totalLabel_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_9A71DFD8E7313615851706EE47E37BBE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total accrued expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_9A71DFD8E7313615851706EE47E37BBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_9A71DFD8E7313615851706EE47E37BBE" xlink:to="lab_us-gaap_AccruedLiabilitiesCurrent_9A71DFD8E7313615851706EE47E37BBE" xlink:type="arc" />
    <link:label id="lab_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670_terseLabel_en-US" xlink:label="lab_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of activity in the warranty reserve account:</link:label>
    <link:label id="lab_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670_label_en-US" xlink:label="lab_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Movement in Standard Product Warranty Accrual [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MovementInStandardProductWarrantyAccrualRollForward" xlink:label="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670" xlink:to="lab_us-gaap_MovementInStandardProductWarrantyAccrualRollForward_BD1928671E5CD7328AC806EE47E4D670" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738_periodStartLabel_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at beginning of period</link:label>
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738_label_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standard Product Warranty Accrual</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738" xlink:to="lab_us-gaap_StandardProductWarrantyAccrual_3EDAC1891A42F161E3DD06EE47E4B738" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588_terseLabel_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision</link:label>
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588_label_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standard Product Warranty Accrual, Increase for Warranties Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandardProductWarrantyAccrualWarrantiesIssued" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588" xlink:to="lab_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_4EDF9F0B7B4903F9C3F606EE47E48588" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02_negatedLabel_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Utilization</link:label>
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02_label_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standard Product Warranty Accrual, Decrease for Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandardProductWarrantyAccrualPayments" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02" xlink:to="lab_us-gaap_StandardProductWarrantyAccrualPayments_D5991600DD59FE50EB1906EE47E57D02" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandardProductWarrantyAccrual_2CA38972B42CE09AA07906EE47E5CBF8_periodEndLabel_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyAccrual_2CA38972B42CE09AA07906EE47E5CBF8" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance at end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandardProductWarrantyAccrual" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_2CA38972B42CE09AA07906EE47E5CBF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandardProductWarrantyAccrual_2CA38972B42CE09AA07906EE47E5CBF8" xlink:to="lab_us-gaap_StandardProductWarrantyAccrual_2CA38972B42CE09AA07906EE47E5CBF8" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-current liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Noncurrent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B" xlink:to="lab_us-gaap_LiabilitiesNoncurrentAbstract_2AA53199C8913AAF2A9206EE47E5289B" xlink:type="arc" />
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    <link:label id="lab_us-gaap_FairValueAdjustmentOfWarrants_9D1369649DD280CEB66B2B7220E38BC5_negatedLabel_en-US" xlink:label="lab_us-gaap_FairValueAdjustmentOfWarrants_9D1369649DD280CEB66B2B7220E38BC5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Gain on equity issuance</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B1234C74CDCDAE0DAC03263F7DE08B83" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B1234C74CDCDAE0DAC03263F7DE08B83" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B1234C74CDCDAE0DAC03263F7DE08B83" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization in 2021</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7486060FF16717671158263F7DE041AE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization in 2022</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_163FB20905EE934305B8263F7DE04DA2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization in 2023</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_296FFFB1BCB855D4E08D263F7DE174A0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated annual amortization, thereafter</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_97355093938B68FCDB85263F7DE103A1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intrinsic value of stock options exercised</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_2901A83E9A8EE81EFC8CAB4A4DF3A7E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk-free interest rate, minimum (in percentage)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_0C72BF4D28E6350E1335C9BB4D88C41A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk-free interest rate, maximum (in percentage)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_708D314D13BF96425CCEC9BB4D88E0FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1CB68B1A2A339AF0D1F3C9BB4D88B28C_verboseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1CB68B1A2A339AF0D1F3C9BB4D88B28C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expected term of options (in years)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1CB68B1A2A339AF0D1F3C9BB4D88B28C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1CB68B1A2A339AF0D1F3C9BB4D88B28C" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1CB68B1A2A339AF0D1F3C9BB4D88B28C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average grant-date fair value per share (USD per share)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B5ACDFD124DE99D8F8A1C9BB4D88998F" xlink:type="arc" />
    <link:label id="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D_terseLabel_en-US" xlink:label="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Economic Loss Claim</link:label>
    <link:label id="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D_label_en-US" xlink:label="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Economic Loss Claim [Member]</link:label>
    <link:label id="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D_documentation_en-US" xlink:label="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Economic Loss Claim [Member]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_BusinessEconomicLossClaimMember" xlink:label="loc_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:to="lab_gsat_BusinessEconomicLossClaimMember_719D75B184EEF82AC73315B8F367E60D" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631" xlink:to="lab_us-gaap_SubsequentEventTypeAxis_0F6612A5B30DF3BB3DD415B8F367F631" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900" xlink:to="lab_us-gaap_SubsequentEventTypeDomain_6C638FB31DB062CA9F5915B8F3674900" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventMember_F638F411E99547EB9BEA15B8F3689D2D_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_F638F411E99547EB9BEA15B8F3689D2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event</link:label>
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    <link:label id="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis_575062932789E975AF4C264409087FDC_documentation_en-US" xlink:label="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis_575062932789E975AF4C264409087FDC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property Plant And Equipment Additional Disclosures [Axis]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis" xlink:label="loc_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis_575062932789E975AF4C264409087FDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis_575062932789E975AF4C264409087FDC" xlink:to="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis_575062932789E975AF4C264409087FDC" xlink:type="arc" />
    <link:label id="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2_terseLabel_en-US" xlink:label="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property Plant And Equipment Additional Disclosures [Domain]</link:label>
    <link:label id="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2_label_en-US" xlink:label="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property Plant And Equipment Additional Disclosures [Domain]</link:label>
    <link:label id="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2_documentation_en-US" xlink:label="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property Plant And Equipment Additional Disclosures [Domain]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain" xlink:label="loc_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:to="lab_gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain_316EF38B3B6B64FFEE3026440908A6D2" xlink:type="arc" />
    <link:label id="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8_terseLabel_en-US" xlink:label="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">First and second-generation satellites in service</link:label>
    <link:label id="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8_label_en-US" xlink:label="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Second Generation Satellites [Member]</link:label>
    <link:label id="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8_documentation_en-US" xlink:label="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Second Generation Satellites [Member]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_SecondGenerationSatellitesMember" xlink:label="loc_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:to="lab_gsat_SecondGenerationSatellitesMember_2FFFCE8637942596654426440908BAB8" xlink:type="arc" />
    <link:label id="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820_terseLabel_en-US" xlink:label="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Second-generation satellite, on-ground spare</link:label>
    <link:label id="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820_label_en-US" xlink:label="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Second Generation Satellite, On-ground Spare [Member]</link:label>
    <link:label id="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820_documentation_en-US" xlink:label="lab_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Second Generation Satellite, On-ground Spare [Member]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_SecondGenerationSatelliteOnGroundSpareMember" xlink:label="loc_gsat_SecondGenerationSatelliteOnGroundSpareMember_FC9A1EC6241C139C6F75264409094820" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ConstructionInProgressMember_08D43193A890730CD4E6264409091DEF_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_08D43193A890730CD4E6264409091DEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction in progress:</link:label>
    <link:label id="lab_us-gaap_ConstructionInProgressMember_08D43193A890730CD4E6264409091DEF_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressMember_08D43193A890730CD4E6264409091DEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in Progress [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:label="loc_us-gaap_ConstructionInProgressMember_08D43193A890730CD4E6264409091DEF" xlink:type="locator" />
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    <link:label id="lab_gsat_SecondGenerationSoftwareUpgradesMember_D566A2C8BC1F6E477EE52644090AA8C6_terseLabel_en-US" xlink:label="lab_gsat_SecondGenerationSoftwareUpgradesMember_D566A2C8BC1F6E477EE52644090AA8C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Next-generation software upgrades</link:label>
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    <link:label id="lab_gsat_SecondGenerationSoftwareUpgradesMember_D566A2C8BC1F6E477EE52644090AA8C6_documentation_en-US" xlink:label="lab_gsat_SecondGenerationSoftwareUpgradesMember_D566A2C8BC1F6E477EE52644090AA8C6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Second Generation Software Upgrades [Member]</link:label>
    <link:loc xlink:href="gsat-20181231.xsd#gsat_SecondGenerationSoftwareUpgradesMember" xlink:label="loc_gsat_SecondGenerationSoftwareUpgradesMember_D566A2C8BC1F6E477EE52644090AA8C6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_E0ADBF1FBFF8CE1F39092644090BE14A_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_E0ADBF1FBFF8CE1F39092644090BE14A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_E0ADBF1FBFF8CE1F39092644090BE14A_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_E0ADBF1FBFF8CE1F39092644090BE14A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Other Types [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_E0ADBF1FBFF8CE1F39092644090BE14A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_2E17556AE85AEE3C5B942644090B4231_terseLabel_en-US" xlink:label="lab_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_2E17556AE85AEE3C5B942644090B4231" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally developed and purchased software</link:label>
    <link:label id="lab_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_2E17556AE85AEE3C5B942644090B4231_label_en-US" xlink:label="lab_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_2E17556AE85AEE3C5B942644090B4231" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Software and Software Development Costs [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SoftwareAndSoftwareDevelopmentCostsMember" xlink:label="loc_us-gaap_SoftwareAndSoftwareDevelopmentCostsMember_2E17556AE85AEE3C5B942644090B4231" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74_terseLabel_en-US" xlink:label="lab_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equipment</link:label>
    <link:label id="lab_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74_label_en-US" xlink:label="lab_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equipment [Member]</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74" xlink:to="lab_us-gaap_EquipmentMember_DCC0B94548E800EA6A272644090B6B74" xlink:type="arc" />
    <link:label id="lab_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0_terseLabel_en-US" xlink:label="lab_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Land and buildings</link:label>
    <link:label id="lab_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0_label_en-US" xlink:label="lab_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land and Building [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LandAndBuildingMember" xlink:label="loc_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0" xlink:to="lab_us-gaap_LandAndBuildingMember_0011091A5F458CB845FD2644090CD0A0" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leasehold improvements</link:label>
    <link:label id="lab_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB_label_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB" xlink:to="lab_us-gaap_LeaseholdImprovementsMember_4E568403EA11CBF1A06F2644090C42DB" xlink:type="arc" />
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    <link:label id="lab_srt_RestatementAxis_469C2AB911EFC30C73312644090CFACA_label_en-US" xlink:label="lab_srt_RestatementAxis_469C2AB911EFC30C73312644090CFACA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_469C2AB911EFC30C73312644090CFACA" xlink:type="locator" />
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    <link:label id="lab_srt_RestatementDomain_FE5B2CC80FD226E472DD2644090D43DF_label_en-US" xlink:label="lab_srt_RestatementDomain_FE5B2CC80FD226E472DD2644090D43DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_FE5B2CC80FD226E472DD2644090D43DF" xlink:type="locator" />
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    <link:loc xlink:href="gsat-20181231.xsd#gsat_ServicesIGOMember" xlink:label="loc_gsat_ServicesIGOMember_22732696DAC77476F666C1A3D8CA2351" xlink:type="locator" />
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