I have read about the CoreTelephony class and in this CTClass can check caller and find state of call....
But when and how to use this......
I think my application goes to background when call start..
help please or correct me......
It is not possible with the official SDK. The best that you can do is determine if the user is on a call. You can do this by inspecting the size of the status bar frame.
[UIApplication sharedApplication].statusBarFrame
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