Earlier today I went to unlock my phone and the PIN entry keypad wad unresponsive. About 5 seconds later the phone rebooted on its own. It then took an extremely long time to boot. After unlocking, I got a message saying that "system" was not responding, with an option to report (which I did). Afterwards I made a call and the other person was surprised to find out it was me. It turns out that the dialer never went to the in-call screen, and Google Voice never intercepted the call, making the call appear to come from my real cell phone number. Another call later had the same results. Rebooting the phone seems to have cleared up the problem, for now. Has anyone else experienced anything like this?