Important note, after a timeout on the outgoing side, the following is invoked [CallKitClientImpl] [info] reportCallWasEnded callId=[***-***-***], reason=[CXCallEndedReason(rawValue: 3)] which is consistent with this transcript: CXCallEndedReasonFailed = 1, // An error occurred while trying to service the call CXCallEndedReasonRemoteEnded = 2, // The remote party explicitly ended the call CXCallEndedReasonUnanswered = 3, // The call never started connecting and was never explicitly ended (e.g. outgoing/incoming call timeout) CXCallEndedReasonAnsweredElsewhere = 4, // The call was answered on another device CXCallEndedReasonDeclinedElsewhere = 5, // The call was declined on another device } API_AVAILABLE(ios(10.0), macCatalyst(13.0), watchos(9.0)) API_UNAVAILABLE(macos, tvos); It looks like on the outgoing side the finish reason is correct - CXCallEndedReasonUnanswered, but on the receiving side it is handled incorrectly - CXCallEndedReason = remoteEnded