I Have a IPhone 5 in fact my second new phone. The first one would not hang up phone calls using the end button on the screen. I took it into an apple store and talked with a person at the Genius Bar. They had no idea what the problem was and had never heard of it. Based on what I have read on various forums I don't believe that to be true. They gave me a new phone and it worked properly for about a week. Then it started all over again. When it is connected via Bluetooth to any of my vehicles the button on the screen works just fine. The only way I can end a call on the screen is to put it on speaker and hit the mute button and then the end call button will work. Everything else on the bottom of the screen works fine, that to me would indicate the sensors are working. Is this a software issue. HELP
OK, I was having the same problem, but it was with a Lifeproof case on the phone. I was searching this site and saw someone here mention the Lifeproof case. I took my phone out and the END button majically worked. I was very maticulous on how I reinstalled the phone in the case, and the END button is working fine. Guess the Lifeproof case is part of the problem at least in my case.