CoreTelephony Namespace

Provides access to the telephone stack on the device.


The APIs in this namespace are used to fetch information about the cellular network provider as well as information on the current call.


CTCallEncapsulates a unique identifier for a call and it's state.
CTCallCenterHolds a list of current calls and triggers events when their states change.
CTCarrierContains information about the application user's home cellular service provider.
CTErrorDomainAn enumeration whose values specify an error domain.
CTRadioAccessTechnologyDefines constants describing various telephone radio technogies.
CTSubscriberCarrier information for a subscriber.
CTSubscriberInfoInformation on a subscriber to a telephone service.
CTTelephonyNetworkInfoA class that holds information on the application user's cellular service provider.