CoreTelephony iOS 10.3 to 11.0 API Differences

CoreTelephonyDefines.h
Added #def CORETELEPHONY_CLASS_DEPRECATED
CTCallCenter.h
Modified CTCallCenter
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedReplaced by CXCallObserver from CallKit.framework

CTSubscriber.h
Modified CTSubscriber.carrierToken
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedDeprecated and will always return nil in a future release.