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<?taxonomy-date 2020-03-16?>

<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd http://www.w3.org/1999/xlink http://www.xbrl.org/2003/xlink-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ote="http://www.ote.gr/xbrl" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Telecommunicationlicenses" xml:lang="el" id="label_Telecommunicationlicenses_2">Τηλεπικοινωνιακές άδειες</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Telecommunicationlicenses" xlink:to="label_Telecommunicationlicenses_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforyouthaccount" xml:lang="el" id="label_Provisionforyouthaccount_2">Πρόβλεψη για λογαριασμό νεότητας (Ισολογισμός)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforyouthaccount" xlink:to="label_Provisionforyouthaccount_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforstaffretirementindemnities" xml:lang="el" id="label_Provisionforstaffretirementindemnities_2">Πρόβλεψη αποζημίωσης προσωπικού λόγω εξόδου από την υπηρεσία (Χρηματορροές)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforstaffretirementindemnities" xlink:to="label_Provisionforstaffretirementindemnities_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Paymentforvoluntaryleaveschemes" xml:lang="el" id="label_Paymentforvoluntaryleaveschemes_2">Καταβολές προγραμμάτων εθελούσιας αποχώρησης</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Paymentforvoluntaryleaveschemes" xlink:to="label_Paymentforvoluntaryleaveschemes_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xml:lang="el" id="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions_2">Καταβολές αποζημίωσης προσωπικού και λογαριασμού νεότητας, εκτός εισφορών εργαζομένων</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions" xlink:to="label_Paymentofstaffretirementindemnitiesandyouthaccountnetofemployeecontributions_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interestandrelatedexpensespaidexceptlease" xml:lang="el" id="label_Interestandrelatedexpensespaidexceptlease_2">Χρεωστικοί τόκοι και συναφή έξοδα καταβεβλημένα (πλην μισθώσεων)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interestandrelatedexpensespaidexceptlease" xlink:to="label_Interestandrelatedexpensespaidexceptlease_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interestpaidforleases" xml:lang="el" id="label_Interestpaidforleases_2">Τόκοι μισθώσεων καταβεβλημένοι</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interestpaidforleases" xlink:to="label_Interestpaidforleases_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Returnofcapitalinvestedinsubsidiary" xml:lang="el" id="label_Returnofcapitalinvestedinsubsidiary_2">Επιστροφή μετοχικού κεφαλαίου επενδυμένου σε θυγατρική</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Returnofcapitalinvestedinsubsidiary" xlink:to="label_Returnofcapitalinvestedinsubsidiary_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProvisionforyouthaccountCF" xml:lang="el" id="label_ProvisionforyouthaccountCF_2">Πρόβλεψη για λογαριασμό νεότητας (Χρηματορροές)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProvisionforyouthaccountCF" xlink:to="label_ProvisionforyouthaccountCF_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Retailservicesrevenues" xml:lang="el" id="label_Retailservicesrevenues_2">Έσοδα λιανικής</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Retailservicesrevenues" xlink:to="label_Retailservicesrevenues_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Servicerevenues" xml:lang="el" id="label_Servicerevenues_2">Έσοδα υπηρεσιών</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Servicerevenues" xlink:to="label_Servicerevenues_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Handsetrevenues" xml:lang="el" id="label_Handsetrevenues_2">Έσοδα πώλησης συσκευών</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Handsetrevenues" xlink:to="label_Handsetrevenues_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Interconnectionandroamingcosts" xml:lang="el" id="label_Interconnectionandroamingcosts_2">Έξοδα διασύνδεσης και περιαγωγής</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Interconnectionandroamingcosts" xlink:to="label_Interconnectionandroamingcosts_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalprofitlossfromfinancialandinvestingactivities" xml:lang="el" id="label_Totalprofitlossfromfinancialandinvestingactivities_2">Συνολικά κέρδη / (ζημιές) από χρηματοοικονομικές και επενδυτικές δραστηριότητες</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalprofitlossfromfinancialandinvestingactivities" xlink:to="label_Totalprofitlossfromfinancialandinvestingactivities_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xml:lang="el" id="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate_2">Αναβαλλόμενοι φόροι επί των αναλογιστικών κερδών / (ζημιών) λόγω αλλαγής στο φορολογικό συντελεστή</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Deferredtaxesonactuarialgainslossesduetochangeintaxrate" xlink:to="label_Deferredtaxesonactuarialgainslossesduetochangeintaxrate_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Otherrevenuesmobile" xml:lang="el" id="label_Otherrevenuesmobile_2">Λοιπά έσοδα</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Otherrevenuesmobile" xlink:to="label_Otherrevenuesmobile_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Constructioncostnetwork" xml:lang="el" id="label_Constructioncostnetwork_2">Κόστος κατασκευής δικτύου</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Constructioncostnetwork" xlink:to="label_Constructioncostnetwork_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Othersundryoperatingexpenses" xml:lang="el" id="label_Othersundryoperatingexpenses_2">Λοιπά λειτουργικά έξοδα</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Othersundryoperatingexpenses" xlink:to="label_Othersundryoperatingexpenses_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Deferredtaxesonactuarialgainslosses" xml:lang="el" id="label_Deferredtaxesonactuarialgainslosses_2">Αναβαλλόμενοι φόροι επί των αναλογιστικών κερδών / (ζημιών)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Deferredtaxesonactuarialgainslosses" xlink:to="label_Deferredtaxesonactuarialgainslosses_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Gainslossesfrominvestmentsandotherfinancialassets" xml:lang="el" id="label_Gainslossesfrominvestmentsandotherfinancialassets_2">(Κέρδη) / ζημιές από συμμετοχές και λοιπά χρηματοοικονομικά περιουσιακά στοιχεία - Απομειώσεις (Χρηματορροές)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Gainslossesfrominvestmentsandotherfinancialassets" xlink:to="label_Gainslossesfrominvestmentsandotherfinancialassets_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment" xml:lang="el" id="label_GainslossesfrominvestmentsandotherfinancialassetsImpairment_2">Κέρδη / (ζημιές) από συμμετοχές και λοιπά χρηματοοικονομικά περιουσιακά στοιχεία - Απομειώσεις (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_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalrevenuesfromfixedbusiness" xml:lang="el" id="label_Totalrevenuesfromfixedbusiness_2">Σύνολο εσόδων σταθερής τηλεφωνίας</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalrevenuesfromfixedbusiness" xlink:to="label_Totalrevenuesfromfixedbusiness_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Totalrevenuesfrommobilebusiness" xml:lang="el" id="label_Totalrevenuesfrommobilebusiness_2">Σύνολο εσόδων κινητής τηλεφωνίας</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Totalrevenuesfrommobilebusiness" xlink:to="label_Totalrevenuesfrommobilebusiness_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Personnelcosts" xml:lang="el" id="label_Personnelcosts_2">Αποδοχές προσωπικού</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Personnelcosts" xlink:to="label_Personnelcosts_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Costsrelatedtovoluntaryleaveschemes" xml:lang="el" id="label_Costsrelatedtovoluntaryleaveschemes_2">Κόστη σχετιζόμενα με προγράμματα εθελούσιας αποχώρησης</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Costsrelatedtovoluntaryleaveschemes" xlink:to="label_Costsrelatedtovoluntaryleaveschemes_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Facilityandotherleaserelatedcosts" xml:lang="el" id="label_Facilityandotherleaserelatedcosts_2">Ενοίκια, μισθώσεις και κόστος εγκαταστάσεων</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Facilityandotherleaserelatedcosts" xlink:to="label_Facilityandotherleaserelatedcosts_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xml:lang="el" id="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment_2">Λειτουργικά κέρδη προ χρηματοοικονομικών και επενδυτικών δραστηριοτήτων, αποσβέσεων και απομειώσεων</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment" xlink:to="label_Operatingprofitbeforefinancialandinvestingactivitiesdepreciationamortizationandimpairment_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Provisionforexpectedcreditlosses" xml:lang="el" id="label_Provisionforexpectedcreditlosses_2">Πρόβλεψη για επισφαλείς απαιτήσεις</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="Provisionforexpectedcreditlosses" xlink:to="label_Provisionforexpectedcreditlosses_2" 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_Purchaseofpropertyplantandequipmentandintangibleassets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_Purchaseofpropertyplantandequipmentandintangibleassets" xml:lang="el" id="label_Purchaseofpropertyplantandequipmentandintangibleassets">Αγορά ενσώματων και άυλων παγίων περιουσιακών στοιχείων</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="newItem" xlink:to="label_Purchaseofpropertyplantandequipmentandintangibleassets" xlink:title="label: Purchaseofpropertyplantandequipmentandintangibleassets to label_Purchaseofpropertyplantandequipmentandintangibleassets"/>
    <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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProvisionforstaffretirementindemnitiesBS" xml:lang="el" id="label_ProvisionforstaffretirementindemnitiesBS_2">Πρόβλεψη αποζημίωσης προσωπικού λόγω εξόδου από την υπηρεσία (Ισολογισμός)</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProvisionforstaffretirementindemnitiesBS" xlink:to="label_ProvisionforstaffretirementindemnitiesBS_2" xlink:title="label: ProvisionforstaffretirementindemnitiesBS to label_ProvisionforstaffretirementindemnitiesBS"/>
    <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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_OtherOperatingExpensesOutOfWhich" xml:lang="el" id="label_OtherOperatingExpensesOutOfWhich_2">Λοιπά λειτουργικά έξοδα, εκ των οποίων:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="OtherOperatingExpensesOutOfWhich" xlink:to="label_OtherOperatingExpensesOutOfWhich_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xml:lang="el" id="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations_2">Συνολικά έσοδα από συνεχιζόμενες δραστηριότητες που αναλογούν στους ιδιοκτήτες μητρικής</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations" xlink:to="label_CompehensiveIncomeAttributableToOwnersOfParentFromContinuingOperations_2" 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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations" xml:lang="el" id="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations_2">Συνολικά έσοδα από διακοπείσες δραστηριότητες που αναλογούν στους ιδιοκτήτες μητρικής</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations" xlink:to="label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations_2" xlink:title="label: CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations to label_CompehensiveIncomeAttributableToOwnersOfParentFromDiscontinuingOperations"/>
    <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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentOfLoansReceivable" xml:lang="el" id="label_RepaymentOfLoansReceivable_2">Αποπληρωμές εισπρακτέων δανείων</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RepaymentOfLoansReceivable" xlink:to="label_RepaymentOfLoansReceivable_2" xlink:title="label: RepaymentOfLoansReceivable to label_RepaymentOfLoansReceivable"/>
    <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_2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentOfLoansGrantedToSubsidiary" xml:lang="el" id="label_RepaymentOfLoansGrantedToSubsidiary_2">Αποπληρωμή χορηγηθέντων δανείων σε θυγατρική</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RepaymentOfLoansGrantedToSubsidiary" xlink:to="label_RepaymentOfLoansGrantedToSubsidiary_2" 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="el" id="label_NetForeignExchangeGainLoss">Καθαρά συναλλαγματικά κέρδη (ζημιές)</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>
