title: Get the callers phone number from an incoming call on iPhone
body: <p>I'm trying to get caller ID (phone number) at the time of incoming call.
  TrueCaller has implemented this and they get the phone number of incoming caller.</p>
  
  <p>I've found this information:
  1. CoreTelephony Framework(It gives only calling states)
  2. Apple's 9.0 update : "Maybe" contacts sync. with mail app and detects the incoming phone number.</p>