iphone 4s after upgrade screen is black on incoming calls, call is dropped when going to incoming call
iPhone 4s, model MD276LL/A , iOS 8.3, capacity 16 G, version8.3 (12F70)
Possibly related to a recent upgrade, the screen remains black, and when logging on I must manually navigate to the phone once I have opened this window the incoming call does not show and calls are dropped.
MacBook Pro (Retina, 13-inch, Late 2012), iOS 8.3