Calls with no sound then fail
I have an IPhone 7 Plus in excellent condition. Never had any problems before. I try to make a call but i can’t hear it ringing and then it fails. If I try to answer one, I can’t hear anything and neither does the other person. I’ve tried using speaker phone and Bluetooth speaker with mic with same issue. I restart my phone and it works again for a little while but then it happens again. All other sounds on my phone work for media, (Games, movies, etc.) even when this problem is happening. what is wrong with my phone.
iPhone 7 Plus