When I'm on the phone and I press the sleep/wake button and the screen locks. I can not turn the screen back on for about 10 seconds. I noticed that the first time you press he sleep/wake button it takes you to the call screen and you have to press it again so the screen actually locks. Also, I got a call earlier and the screen wouldn't show someone was calling but the phone was ringing. Luckily, I could see who was calling on my watch. Anyone else having screen issues on iOS 10.2??