macOS / binaries /

CoreTelephony

/System/Library/Frameworks/CoreTelephony.framework/CoreTelephony
Access information about a user's cellular service provider, such as its unique identifier and whether the carrier allows VoIP

Use the Core Telephony framework to obtain information about a user's home cellular service provider. Carriers can use this information to write apps that provide services only for their own subscribers. You can also use this framework to obtain information about current cellular calls.