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  <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_TelecommunicationLicenses" xlink:label="Telecommunicationlicenses" xlink:title="Telecommunicationlicenses"/>
    <link:label xlink:type="resource" xlink:label="label_Telecommunicationlicenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Telecommunicationlicenses" xml:lang="en" id="label_Telecommunicationlicenses">Telecommunication licenses </link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Telecommunicationlicenses" xlink:to="label_Telecommunicationlicenses" xlink:title="label: Telecommunicationlicenses to label_Telecommunicationlicenses"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ProvisionForYouthAccountBalanceSheet" xlink:label="Provisionforyouthaccount" xlink:title="Provisionforyouthaccount"/>
    <link:label xlink:type="resource" xlink:label="label_Provisionforyouthaccount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforyouthaccount" xml:lang="en" id="label_Provisionforyouthaccount">Provision for youth account (Balance Sheet)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforyouthaccount" xlink:to="label_Provisionforyouthaccount" xlink:title="label: Provisionforyouthaccount to label_Provisionforyouthaccount"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ProvisionForStaffRetirementIndemnitiesCashFlow" xlink:label="Provisionforstaffretirementindemnities" xlink:title="Provisionforstaffretirementindemnities"/>
    <link:label xlink:type="resource" xlink:label="label_Provisionforstaffretirementindemnities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforstaffretirementindemnities" xml:lang="en" id="label_Provisionforstaffretirementindemnities">Provision for staff retirement indemnities (Cash Flow)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforstaffretirementindemnities" xlink:to="label_Provisionforstaffretirementindemnities" xlink:title="label: Provisionforstaffretirementindemnities to label_Provisionforstaffretirementindemnities"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_PaymentForVoluntaryLeaveSchemes" xlink:label="Paymentforvoluntaryleaveschemes" xlink:title="Paymentforvoluntaryleaveschemes"/>
    <link:label xlink:type="resource" xlink:label="label_Paymentforvoluntaryleaveschemes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Paymentforvoluntaryleaveschemes" xml:lang="en" id="label_Paymentforvoluntaryleaveschemes">Payment for voluntary leave schemes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Paymentforvoluntaryleaveschemes" xlink:to="label_Paymentforvoluntaryleaveschemes" xlink:title="label: Paymentforvoluntaryleaveschemes to label_Paymentforvoluntaryleaveschemes"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_PaymentOfStaffRetirementIndemnitiesAndYouthAccountNetOfEmployeesContributions" xlink:label="Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xlink:title="Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions"/>
    <link:label xlink:type="resource" xlink:label="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xml:lang="en" id="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions">Payment of staff retirement indemnities and youth account, net of employees' contributions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xlink:to="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xlink:title="label: Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions to label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_InterestAndRelatedExpensesPaidExceptLeases" xlink:label="Interestandrelatedexpensespaidexceptlease" xlink:title="Interestandrelatedexpensespaidexceptlease"/>
    <link:label xlink:type="resource" xlink:label="label_Interestandrelatedexpensespaidexceptlease" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interestandrelatedexpensespaidexceptlease" xml:lang="en" id="label_Interestandrelatedexpensespaidexceptlease">Interest and related expenses paid (except leases)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interestandrelatedexpensespaidexceptlease" xlink:to="label_Interestandrelatedexpensespaidexceptlease" xlink:title="label: Interestandrelatedexpensespaidexceptlease to label_Interestandrelatedexpensespaidexceptlease"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_InterestPaidForLeases" xlink:label="Interestpaidforleases" xlink:title="Interestpaidforleases"/>
    <link:label xlink:type="resource" xlink:label="label_Interestpaidforleases" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interestpaidforleases" xml:lang="en" id="label_Interestpaidforleases">Interest paid for leases</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interestpaidforleases" xlink:to="label_Interestpaidforleases" xlink:title="label: Interestpaidforleases to label_Interestpaidforleases"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ReturnOfCapitalInvestedInSubsidiary" xlink:label="Returnofcapitalinvestedinsubsidiary" xlink:title="Returnofcapitalinvestedinsubsidiary"/>
    <link:label xlink:type="resource" xlink:label="label_Returnofcapitalinvestedinsubsidiary" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Returnofcapitalinvestedinsubsidiary" xml:lang="en" id="label_Returnofcapitalinvestedinsubsidiary">Return of capital invested in subsidiary</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Returnofcapitalinvestedinsubsidiary" xlink:to="label_Returnofcapitalinvestedinsubsidiary" xlink:title="label: Returnofcapitalinvestedinsubsidiary to label_Returnofcapitalinvestedinsubsidiary"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ProvisionForYouthAccountCashFlow" xlink:label="ProvisionforyouthaccountCF" xlink:title="ProvisionforyouthaccountCF"/>
    <link:label xlink:type="resource" xlink:label="label_ProvisionforyouthaccountCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProvisionforyouthaccountCF" xml:lang="en" id="label_ProvisionforyouthaccountCF">Provision for youth account (Cash Flow)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProvisionforyouthaccountCF" xlink:to="label_ProvisionforyouthaccountCF" xlink:title="label: ProvisionforyouthaccountCF to label_ProvisionforyouthaccountCF"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_RetailServicesRevenues" xlink:label="Retailservicesrevenues" xlink:title="Retailservicesrevenues"/>
    <link:label xlink:type="resource" xlink:label="label_Retailservicesrevenues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Retailservicesrevenues" xml:lang="en" id="label_Retailservicesrevenues">Retail services revenues</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Retailservicesrevenues" xlink:to="label_Retailservicesrevenues" xlink:title="label: Retailservicesrevenues to label_Retailservicesrevenues"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ServiceRevenues" xlink:label="Servicerevenues" xlink:title="Servicerevenues"/>
    <link:label xlink:type="resource" xlink:label="label_Servicerevenues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Servicerevenues" xml:lang="en" id="label_Servicerevenues">Service revenues</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Servicerevenues" xlink:to="label_Servicerevenues" xlink:title="label: Servicerevenues to label_Servicerevenues"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_HandsetRevenues" xlink:label="Handsetrevenues" xlink:title="Handsetrevenues"/>
    <link:label xlink:type="resource" xlink:label="label_Handsetrevenues" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Handsetrevenues" xml:lang="en" id="label_Handsetrevenues">Handset revenues</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Handsetrevenues" xlink:to="label_Handsetrevenues" xlink:title="label: Handsetrevenues to label_Handsetrevenues"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_InterconnectionAndRoamingCosts" xlink:label="Interconnectionandroamingcosts" xlink:title="Interconnectionandroamingcosts"/>
    <link:label xlink:type="resource" xlink:label="label_Interconnectionandroamingcosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interconnectionandroamingcosts" xml:lang="en" id="label_Interconnectionandroamingcosts">Interconnection and roaming costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interconnectionandroamingcosts" xlink:to="label_Interconnectionandroamingcosts" xlink:title="label: Interconnectionandroamingcosts to label_Interconnectionandroamingcosts"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_TotalProfitLossFromFinancialAndInvestingActivities" xlink:label="Totalprofitlossfromfinancialandinvestingactivities" xlink:title="Totalprofitlossfromfinancialandinvestingactivities"/>
    <link:label xlink:type="resource" xlink:label="label_Totalprofitlossfromfinancialandinvestingactivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalprofitlossfromfinancialandinvestingactivities" xml:lang="en" id="label_Totalprofitlossfromfinancialandinvestingactivities">Total profit  / (loss) from financial and investing activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalprofitlossfromfinancialandinvestingactivities" xlink:to="label_Totalprofitlossfromfinancialandinvestingactivities" xlink:title="label: Totalprofitlossfromfinancialandinvestingactivities to label_Totalprofitlossfromfinancialandinvestingactivities"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_DeferredTaxesOnActuarialGainsLossesDueToChangeInTaxRate" xlink:label="Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xlink:title="Deferredtaxesonactuarialgainslossesduetochangeintaxrate"/>
    <link:label xlink:type="resource" xlink:label="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xml:lang="en" id="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate">Deferred taxes on actuarial gains / (losses) due to change in tax rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xlink:to="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xlink:title="label: Deferredtaxesonactuarialgainslossesduetochangeintaxrate to label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_OtherRevenues" xlink:label="Otherrevenuesmobile" xlink:title="Otherrevenuesmobile"/>
    <link:label xlink:type="resource" xlink:label="label_Otherrevenuesmobile" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Otherrevenuesmobile" xml:lang="en" id="label_Otherrevenuesmobile">Other revenues</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Otherrevenuesmobile" xlink:to="label_Otherrevenuesmobile" xlink:title="label: Otherrevenuesmobile to label_Otherrevenuesmobile"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ConstructionCostNetwork" xlink:label="Constructioncostnetwork" xlink:title="Constructioncostnetwork"/>
    <link:label xlink:type="resource" xlink:label="label_Constructioncostnetwork" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Constructioncostnetwork" xml:lang="en" id="label_Constructioncostnetwork">Construction cost network</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Constructioncostnetwork" xlink:to="label_Constructioncostnetwork" xlink:title="label: Constructioncostnetwork to label_Constructioncostnetwork"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_OtherSundryOperatingExpenses" xlink:label="Othersundryoperatingexpenses" xlink:title="Othersundryoperatingexpenses"/>
    <link:label xlink:type="resource" xlink:label="label_Othersundryoperatingexpenses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Othersundryoperatingexpenses" xml:lang="en" id="label_Othersundryoperatingexpenses">Other sundry operating expenses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Othersundryoperatingexpenses" xlink:to="label_Othersundryoperatingexpenses" xlink:title="label: Othersundryoperatingexpenses to label_Othersundryoperatingexpenses"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_DeferredTaxesOnActuarialGainsLosses" xlink:label="Deferredtaxesonactuarialgainslosses" xlink:title="Deferredtaxesonactuarialgainslosses"/>
    <link:label xlink:type="resource" xlink:label="label_Deferredtaxesonactuarialgainslosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Deferredtaxesonactuarialgainslosses" xml:lang="en" id="label_Deferredtaxesonactuarialgainslosses">Deferred taxes on actuarial gains / (losses)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Deferredtaxesonactuarialgainslosses" xlink:to="label_Deferredtaxesonactuarialgainslosses" xlink:title="label: Deferredtaxesonactuarialgainslosses to label_Deferredtaxesonactuarialgainslosses"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_GainsLossesFromInvestmentsAndOtherFinancialAssetsImpairmentCashFlow" xlink:label="Gainslossesfrominvestmentsandotherfinancialassets" xlink:title="Gainslossesfrominvestmentsandotherfinancialassets"/>
    <link:label xlink:type="resource" xlink:label="label_Gainslossesfrominvestmentsandotherfinancialassets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Gainslossesfrominvestmentsandotherfinancialassets" xml:lang="en" id="label_Gainslossesfrominvestmentsandotherfinancialassets">(Gains) / losses from investments and other financial assets – Impairment (Cash Flow)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Gainslossesfrominvestmentsandotherfinancialassets" xlink:to="label_Gainslossesfrominvestmentsandotherfinancialassets" xlink:title="label: Gainslossesfrominvestmentsandotherfinancialassets to label_Gainslossesfrominvestmentsandotherfinancialassets"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_GainsLossesFromInvestmentsAndOtherFinancialAssetsImpairmentPnl" xlink:label="GainslossesfrominvestmentsandotherfinancialassetsImpairment" xlink:title="GainslossesfrominvestmentsandotherfinancialassetsImpairment"/>
    <link:label xlink:type="resource" xlink:label="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment" xml:lang="en" id="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment">Gains / (losses) from investments and other financial assets - Impairment (PnL)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="GainslossesfrominvestmentsandotherfinancialassetsImpairment" xlink:to="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment" xlink:title="label: GainslossesfrominvestmentsandotherfinancialassetsImpairment to label_GainslossesfrominvestmentsandotherfinancialassetsImpairment"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_TotalRevenuesFromFixedBusiness" xlink:label="Totalrevenuesfromfixedbusiness" xlink:title="Totalrevenuesfromfixedbusiness"/>
    <link:label xlink:type="resource" xlink:label="label_Totalrevenuesfromfixedbusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalrevenuesfromfixedbusiness" xml:lang="en" id="label_Totalrevenuesfromfixedbusiness">Total revenues from fixed business</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalrevenuesfromfixedbusiness" xlink:to="label_Totalrevenuesfromfixedbusiness" xlink:title="label: Totalrevenuesfromfixedbusiness to label_Totalrevenuesfromfixedbusiness"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_TotalRevenuesFromMobileBusiness" xlink:label="Totalrevenuesfrommobilebusiness" xlink:title="Totalrevenuesfrommobilebusiness"/>
    <link:label xlink:type="resource" xlink:label="label_Totalrevenuesfrommobilebusiness" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalrevenuesfrommobilebusiness" xml:lang="en" id="label_Totalrevenuesfrommobilebusiness">Total revenues from mobile business</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalrevenuesfrommobilebusiness" xlink:to="label_Totalrevenuesfrommobilebusiness" xlink:title="label: Totalrevenuesfrommobilebusiness to label_Totalrevenuesfrommobilebusiness"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_PersonnelCosts" xlink:label="Personnelcosts" xlink:title="Personnelcosts"/>
    <link:label xlink:type="resource" xlink:label="label_Personnelcosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Personnelcosts" xml:lang="en" id="label_Personnelcosts">Personnel costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Personnelcosts" xlink:to="label_Personnelcosts" xlink:title="label: Personnelcosts to label_Personnelcosts"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_CostsRelatedToVoluntaryLeaveSchemes" xlink:label="Costsrelatedtovoluntaryleaveschemes" xlink:title="Costsrelatedtovoluntaryleaveschemes"/>
    <link:label xlink:type="resource" xlink:label="label_Costsrelatedtovoluntaryleaveschemes" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Costsrelatedtovoluntaryleaveschemes" xml:lang="en" id="label_Costsrelatedtovoluntaryleaveschemes">Costs related to voluntary leave schemes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Costsrelatedtovoluntaryleaveschemes" xlink:to="label_Costsrelatedtovoluntaryleaveschemes" xlink:title="label: Costsrelatedtovoluntaryleaveschemes to label_Costsrelatedtovoluntaryleaveschemes"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_FacilityAndOtherLeaseRelatedCosts" xlink:label="Facilityandotherleaserelatedcosts" xlink:title="Facilityandotherleaserelatedcosts"/>
    <link:label xlink:type="resource" xlink:label="label_Facilityandotherleaserelatedcosts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Facilityandotherleaserelatedcosts" xml:lang="en" id="label_Facilityandotherleaserelatedcosts">Facility and other lease related costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Facilityandotherleaserelatedcosts" xlink:to="label_Facilityandotherleaserelatedcosts" xlink:title="label: Facilityandotherleaserelatedcosts to label_Facilityandotherleaserelatedcosts"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_OperatingProfitBeforeFinancialAndInvestingActivitiesDepreciationAmortizationAndImpairment" xlink:label="Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xlink:title="Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment"/>
    <link:label xlink:type="resource" xlink:label="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xml:lang="en" id="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment">Operating profit before financial and investing activities, depreciation, amortization and impairment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xlink:to="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xlink:title="label: Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment to label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ProvisionForExpectedCreditLosses" xlink:label="Provisionforexpectedcreditlosses" xlink:title="Provisionforexpectedcreditlosses"/>
    <link:label xlink:type="resource" xlink:label="label_Provisionforexpectedcreditlosses" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforexpectedcreditlosses" xml:lang="en" id="label_Provisionforexpectedcreditlosses">Provision for expected credit losses</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforexpectedcreditlosses" xlink:to="label_Provisionforexpectedcreditlosses" xlink:title="label: Provisionforexpectedcreditlosses to label_Provisionforexpectedcreditlosses"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssets" xlink:label="newItem" xlink:title="newItem"/>
    <link:label xlink:type="resource" xlink:label="label_newItem" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_newItem" xml:lang="en" id="label_newItem">Purchase of property, plant and equipment and intangible assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="newItem" xlink:to="label_newItem" xlink:title="label: newItem to label_newItem"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ProvisionForStaffRetirementIndemnitiesBalanceSheet" xlink:label="ProvisionforstaffretirementindemnitiesBS" xlink:title="ProvisionforstaffretirementindemnitiesBS"/>
    <link:label xlink:type="resource" xlink:label="label_ProvisionforstaffretirementindemnitiesBS" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProvisionforstaffretirementindemnitiesBS" xml:lang="en" id="label_ProvisionforstaffretirementindemnitiesBS">Provision for staff retirement indemnities (Balance Sheet)</link:label>
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    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_OtherOperatingExpensesOutOfWhich" xlink:label="OtherOperatingExpensesOutOfWhich" xlink:title="OtherOperatingExpensesOutOfWhich"/>
    <link:label xlink:type="resource" xlink:label="label_OtherOperatingExpensesOutOfWhich" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_OtherOperatingExpensesOutOfWhich" xml:lang="en" id="label_OtherOperatingExpensesOutOfWhich">Other operating expenses, out of which</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherOperatingExpensesOutOfWhich" xlink:to="label_OtherOperatingExpensesOutOfWhich" xlink:title="label: OtherOperatingExpensesOutOfWhich to label_OtherOperatingExpensesOutOfWhich"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ComprehensiveIncomeFromContinuingOperationsAttributableToOwnersOfTheParent" xlink:label="CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xlink:title="CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations"/>
    <link:label xlink:type="resource" xlink:label="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xml:lang="en" id="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations">Comprehensive income from continuing operations attributable to owners of the parent</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xlink:to="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xlink:title="label: CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations to label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_ComprehensiveIncomeFromDiscontinuingOperationsAttributableToOwnersOfTheParent" xlink:label="CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations" xlink:title="CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations"/>
    <link:label xlink:type="resource" xlink:label="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations" xml:lang="en" id="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations">Comprehensive income from discontinuing operations attributable to owners of the parent</link:label>
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    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_RepaymentOfLoansReceivable" xlink:label="RepaymentOfLoansReceivable" xlink:title="RepaymentOfLoansReceivable"/>
    <link:label xlink:type="resource" xlink:label="label_RepaymentOfLoansReceivable" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentOfLoansReceivable" xml:lang="en" id="label_RepaymentOfLoansReceivable">Repayment of loans receivable</link:label>
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    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_RepaymentOfLoansGrantedToSubsidiary" xlink:label="RepaymentOfLoansGrantedToSubsidiary" xlink:title="RepaymentOfLoansGrantedToSubsidiary"/>
    <link:label xlink:type="resource" xlink:label="label_RepaymentOfLoansGrantedToSubsidiary" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentOfLoansGrantedToSubsidiary" xml:lang="en" id="label_RepaymentOfLoansGrantedToSubsidiary">Repayment of loans granted to subsidiary</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RepaymentOfLoansGrantedToSubsidiary" xlink:to="label_RepaymentOfLoansGrantedToSubsidiary" xlink:title="label: RepaymentOfLoansGrantedToSubsidiary to label_RepaymentOfLoansGrantedToSubsidiary"/>
    <link:loc xlink:type="locator" xlink:href="ote-2021-12-31.xsd#ote_NetForeignExchangeGainLoss" xlink:label="NetForeignExchangeGainLoss" xlink:title="NetForeignExchangeGainLoss"/>
    <link:label xlink:type="resource" xlink:label="label_NetForeignExchangeGainLoss" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_NetForeignExchangeGainLoss" xml:lang="en" id="label_NetForeignExchangeGainLoss">Net foreign exchange gain (loss) </link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetForeignExchangeGainLoss" xlink:to="label_NetForeignExchangeGainLoss" xlink:title="label: NetForeignExchangeGainLoss to label_NetForeignExchangeGainLoss"/>
  </link:labelLink>
</link:linkbase>
