Looks like I'm actually searching for the opposite from some of the threads I found. Most people seem to want to be able to lock their screen while on a call (using bluetooth headsets mostly), and I'd prefer it didn't go to lock while on a call. I just find it annoying when I've been talking for a few seconds or minutes, then take the phone away from my head, having to wake up the screen by swiping my thumb across the light sensor, set the unlock pattern, hit the home button to leave the dialer app, find the app I need to look something up in while talking, etc. And sometimes it doesn't go to lock at all! Does anyone know why/when the screen goes to lock during a call only? The rest of the time, it takes the full 10 minutes I have it set for before dimming out and shutting down. But usually, during a call, it seems like only a few seconds.