Alright, I've been having fun with my iPhone for the past few hours, but I've noticed that no matter what I do, once I place a call and move the phone to my ear, the proximity sensor turns the screen off as normal, but it doesn't come back on again until I hit the lock button to end the call, and I hear the lock "click". I then have to hit the home button again and I'm back. This is very frustrating especially when I was dialing an automated line (the apple store) where I needed to listen to choices and then hit a number to be transferred. I can't get back no matter what. I've tried hard-resetting and whatnot...anyone else having the same issue?