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  <xs:element id="band_CPaaSUsageBasedFeesMember" abstract="true" name="CPaaSUsageBasedFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="band_CPaaSServiceFeesMember" abstract="true" name="CPaaSServiceFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="band_StockOptionsAndRestrictedStockUnitsEmployeesMember" abstract="true" name="StockOptionsAndRestrictedStockUnitsEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="band_ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028Member" abstract="true" name="ZeroPointFiveZeroPercentConvertibleSeniorNotesDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="band_OperatingLeaseRightOfUseAssetAccumulatedAmortization" abstract="false" name="OperatingLeaseRightOfUseAssetAccumulatedAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="band_LeaseIncentive" abstract="false" name="LeaseIncentive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_LesseeOperatingLeaseAccruedLeaseIncentive" abstract="false" name="LesseeOperatingLeaseAccruedLeaseIncentive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_ComputerAndOfficeEquipmentMember" abstract="true" name="ComputerAndOfficeEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="band_TelecommunicationsEquipmentMember" abstract="true" name="TelecommunicationsEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="band_BankOfAmericaCreditAgreementMember" abstract="true" name="BankOfAmericaCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="band_VotingCommonStockMember" abstract="true" name="VotingCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="band_LineOfCreditFacilityAccordionFeatureIncreaseLimit" abstract="false" name="LineOfCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_LineOfCreditFacilityDaysPriorToMaturityDate" abstract="false" name="LineOfCreditFacilityDaysPriorToMaturityDate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="band_DebtInstrumentCovenantLiquidityRequiredMinimum" abstract="false" name="DebtInstrumentCovenantLiquidityRequiredMinimum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="band_DebtInstrumentCovenantFixedChargeRatioMinimum" abstract="false" name="DebtInstrumentCovenantFixedChargeRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="band_DebtInstrumentCovenantProFormaLeverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantProFormaLeverageRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="band_DebtInstrumentCovenantProFormaTotalLeverageRatioMaximumAllowed" abstract="false" name="DebtInstrumentCovenantProFormaTotalLeverageRatioMaximumAllowed" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
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  <xs:element id="band_DebtInstrumentConvertibleConversionCappedCallShares" abstract="false" name="DebtInstrumentConvertibleConversionCappedCallShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="band_CommonStockCapitalSharesReservedForFutureIssuancePercentIncrease" abstract="false" name="CommonStockCapitalSharesReservedForFutureIssuancePercentIncrease" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="band_InsuranceCompaniesMember" abstract="true" name="InsuranceCompaniesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="band_DefinedBenefitPlanPlanAssetsIncreaseDecreaseForActuarialGainLoss" abstract="false" name="DefinedBenefitPlanPlanAssetsIncreaseDecreaseForActuarialGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="band_OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossOnFairValueOfPlanAssetsBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanGainLossOnFairValueOfPlanAssetsBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_OtherComprehensiveIncomeLossDefinedBenefitPlanForeignCurrencyTranslationAdjustmentBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossDefinedBenefitPlanForeignCurrencyTranslationAdjustmentBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfSalaryIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="band_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesOtherPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesOtherPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="band_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationCostPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationCostPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="band_EffectiveIncomeTaxRateReconciliationIntangiblesAndDeferredAdjustments" abstract="false" name="EffectiveIncomeTaxRateReconciliationIntangiblesAndDeferredAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="band_EarningsPerShareBasicAndDilutedEPSAbstract" abstract="true" name="EarningsPerShareBasicAndDilutedEPSAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="band_NumeratorUsedToComputeNetIncomeLossPerShareAbstract" abstract="true" name="NumeratorUsedToComputeNetIncomeLossPerShareAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="band_InterestIncomeExpenseOnConvertibleDebtNetOfTax" abstract="false" name="InterestIncomeExpenseOnConvertibleDebtNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="band_KadeRossMember" abstract="true" name="KadeRossMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="band_DarylE.RaifordMember" abstract="true" name="DarylE.RaifordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
