[Brent212]

If you're using S2U2, and the screen is locked, it'll still turn off even with the screen set to stay on indefinitely using identity's suggestion. So if the screen is off, and a call comes in, you can take the call, and once you hang up, your screen will display the S2U2 "locked" screen, and will turn off after about 20-30 seconds. Same with viewing/replying to text messages.

At least, that's how it's working on my phone (which is a Sprint Touch). And I love never having to deal with the screen turning off when I'm using the phone. Their is a risk that I'll forget to turn it off and it'll drain the battery, but the few times that's happened, I've caught it within 5 minutes or so.