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  <xs:element id="atex_RevenueRemainingPerformanceObligationPaymentsRemaining" abstract="false" name="RevenueRemainingPerformanceObligationPaymentsRemaining" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicensesGrantedNumberOfLicenseRemaining" abstract="false" name="BroadbandLicensesGrantedNumberOfLicenseRemaining" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="atex_CapitalizedContractCostsRollForward" abstract="true" name="CapitalizedContractCostsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_CapitalizedContractCostAdditions" abstract="false" name="CapitalizedContractCostAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_CapitalizedContractCostAcceleratedAmortization" abstract="false" name="CapitalizedContractCostAcceleratedAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_ContractWithCustomerLiabilityRollForward" abstract="true" name="ContractWithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_ReportableSegmentMember" abstract="true" name="ReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_GeneralAndAdministrativeExpenseAdjusted" abstract="false" name="GeneralAndAdministrativeExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_SellingAndMarketingExpenseAdjusted" abstract="false" name="SellingAndMarketingExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_ResearchAndDevelopmentExpenseAdjusted" abstract="false" name="ResearchAndDevelopmentExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_LowerColoradoRiverAuthorityLCRAMember" abstract="true" name="LowerColoradoRiverAuthorityLCRAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_WirelessLicensesMember" abstract="true" name="WirelessLicensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsInitialPaymentReceived" abstract="false" name="CollaborativeArrangementRightsAndObligationsInitialPaymentReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_EscrowDepositCumulative" abstract="false" name="EscrowDepositCumulative" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_NetworkSitesAndEquipmentMember" abstract="false" name="NetworkSitesAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_LowerColoradoRiverAuthorityMember" abstract="true" name="LowerColoradoRiverAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_OncorElectricDeliveryCompanyLLCMember" abstract="true" name="OncorElectricDeliveryCompanyLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_BroadbandLicensesGrantedNumberOfCounties" abstract="false" name="BroadbandLicensesGrantedNumberOfCounties" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="atex_IndefinitelivedIntangibleAssetsExchangedLicensesReceived" abstract="false" name="IndefinitelivedIntangibleAssetsExchangedLicensesReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_IndefinitelivedIntangibleAssetsExchangedLicensesSurrendered" abstract="false" name="IndefinitelivedIntangibleAssetsExchangedLicensesSurrendered" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicensesTransferredTotalConsideration" abstract="false" name="BroadbandLicensesTransferredTotalConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicenseSaleAssetsAllocatedFromPreviouslyReceivedAmount" abstract="false" name="BroadbandLicenseSaleAssetsAllocatedFromPreviouslyReceivedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicenseSaleDeposit" abstract="false" name="BroadbandLicenseSaleDeposit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicenseSaleReimbursableClearingCostsAndAntiWindfallPayments" abstract="false" name="BroadbandLicenseSaleReimbursableClearingCostsAndAntiWindfallPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_PresidentAndChiefExecutiveOfficerMember" abstract="false" name="PresidentAndChiefExecutiveOfficerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_SeveranceCostsContinuedHealthCareCoverage" abstract="false" name="SeveranceCostsContinuedHealthCareCoverage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_SeveranceAndOtherRelatedCharges" abstract="false" name="SeveranceAndOtherRelatedCharges" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_RestructuringChargesNetOfReclassifications" abstract="false" name="RestructuringChargesNetOfReclassifications" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmountPerMonth" abstract="false" name="DeferredCompensationArrangementWithIndividualCashAwardGrantedAmountPerMonth" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_LeaseTable" abstract="true" name="LeaseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="atex_LeaseLineItems" abstract="true" name="LeaseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_IncomeTaxDisclosureTable" abstract="true" name="IncomeTaxDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="atex_IncomeTaxDisclosureLineItems" abstract="true" name="IncomeTaxDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_OperatingLossCarryforwardsAndDeferredTaxAssetsOperatingLossCarryforwards" abstract="false" name="OperatingLossCarryforwardsAndDeferredTaxAssetsOperatingLossCarryforwards" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_ComponentsOfDeferredTaxAssetsAndLiabilitiesTable" abstract="true" name="ComponentsOfDeferredTaxAssetsAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="atex_ComponentsOfDeferredTaxAssetsAndLiabilitiesLineItems" abstract="true" name="ComponentsOfDeferredTaxAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_DeferredTaxAssetsOperatingLeaseLiabilities" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_DeferredTaxLiabilitiesRou" abstract="false" name="DeferredTaxLiabilitiesRou" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_DeferredTaxAssetsLiabilitiesBeforeValuationAllowance" abstract="false" name="DeferredTaxAssetsLiabilitiesBeforeValuationAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationLimitAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationLimitAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_EffectiveIncomeTaxRateReconciliationIntangibleAssetsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationIntangibleAssetsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationLimitPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationLimitPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atex_EffectiveIncomeTaxRateReconciliationIntangibleAssetsPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationIntangibleAssetsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atex_A2023StockPlanMember" abstract="true" name="A2023StockPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_PerformanceStockUnitsMember" abstract="false" name="PerformanceStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_UnvestedTimeBasedMember" abstract="true" name="UnvestedTimeBasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_PerformanceBasedRestrictedStockMember" abstract="true" name="PerformanceBasedRestrictedStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_TimeBasedStockOptionsMember" abstract="true" name="TimeBasedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_ServiceStockOptionsMember" abstract="false" name="ServiceStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_MetricAxis" abstract="true" name="MetricAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="atex_MetricDomain" abstract="true" name="MetricDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_CumulativeSpectrumProceedsMonetizedMember" abstract="false" name="CumulativeSpectrumProceedsMonetizedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_TotalStockholdersReturnMember" abstract="false" name="TotalStockholdersReturnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_SeniorExecutiveOfficerMember" abstract="true" name="SeniorExecutiveOfficerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOptionalExtensionPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOptionalExtensionPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingIfTargetMetricAchieved" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingIfTargetMetricAchieved" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRequirementsAnnualCompoundGrowthRateUsedToCalculateStockPriceLevels" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingRequirementsAnnualCompoundGrowthRateUsedToCalculateStockPriceLevels" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardCommonStockTradingDayPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardCommonStockTradingDayPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_ShareBasedPaymentArrangementPlanModificationImmediateIncrementalCost" abstract="false" name="ShareBasedPaymentArrangementPlanModificationImmediateIncrementalCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPricePeriodForAwardVesting" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPricePeriodForAwardVesting" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetAwardVestingPercentage" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardTargetAwardVestingPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="atex_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atex_NonCashInvestingActivityAbstract" abstract="true" name="NonCashInvestingActivityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="atex_AssetRetirementObligationCapitalizedChangeInEstimate" abstract="false" name="AssetRetirementObligationCapitalizedChangeInEstimate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_ContributionOfPropertyInExchangeForIntangibleAssets" abstract="false" name="ContributionOfPropertyInExchangeForIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_FairValueOfLicensesAcquired" abstract="false" name="FairValueOfLicensesAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_DerecognitionOfContingentLiabilityRelatedToSaleOfIntangibleAssets" abstract="false" name="DerecognitionOfContingentLiabilityRelatedToSaleOfIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_RightsOfUseAssetForModificationsAndRenewals" abstract="false" name="RightsOfUseAssetForModificationsAndRenewals" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_SanDiegoGasElectricCompanyMember" abstract="false" name="SanDiegoGasElectricCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_LowerColoradoRiverAuthorityLCRAExpansionMember" abstract="true" name="LowerColoradoRiverAuthorityLCRAExpansionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atex_BroadbandLicensesGrantedPaymentReceived" abstract="false" name="BroadbandLicensesGrantedPaymentReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicensesGrantedNumberOfLicenseDelivered" abstract="false" name="BroadbandLicensesGrantedNumberOfLicenseDelivered" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsCustomerCredit" abstract="false" name="CollaborativeArrangementRightsAndObligationsCustomerCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_BroadbandLicenseConsiderationReimbursableClearingCostsAndAntiWindfallPayments" abstract="false" name="BroadbandLicenseConsiderationReimbursableClearingCostsAndAntiWindfallPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsContingentConsiderationCurrent" abstract="false" name="CollaborativeArrangementRightsAndObligationsContingentConsiderationCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsContingentConsiderationNoncurrent" abstract="false" name="CollaborativeArrangementRightsAndObligationsContingentConsiderationNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsAgreementTerm" abstract="false" name="CollaborativeArrangementRightsAndObligationsAgreementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="atex_CollaborativeArrangementRightsAndObligationsNumberOfStatesInServiceTerritory" abstract="false" name="CollaborativeArrangementRightsAndObligationsNumberOfStatesInServiceTerritory" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="atex_PublicUtilityDistrictNo.1OfBentonCountyMember" abstract="true" name="PublicUtilityDistrictNo.1OfBentonCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
