This doesn't happen all the time, but I get a total black screen and no response at all. The only way out of it is a battery pull or hold the power button until it reboot. This happens in my pouch, and when I pull the phone out, it is locked up. The phone does seem a "tad" warm, not extremely or overly hot, just a little warm. The only fix is a battery pull or hold the power button down until it restarts. I had thought maybe the case I had on it was causing it to get hot, but not so, because this happened early this morning, and just a bit ago tonight, so that makes twice now today it's done this. I just came from a reboot nightmare with the warp, and I sure don't want this again. This did this in factory state, so I know for a fact it's not root at all, so anyone have any ideas?