How to use the CoreTelephony framework

Question

can anyone help me in understanding the structure of CoreTelephony by talking about any of the below

• any simple application example using the telephony core infrastructure

• I can add the basic telephony infrastructure, but I cannot import any header file.

although they exist within the framework that I added

any help will be visible as soon as possible.

thank

Answer 1

CoreTelephony files imported with <> not ""
For example:

#import<CoreTelephony/CTCarrier.h>