Been having this problem for about a month now, thought it was totally gone today. Spent over an hour trying to get it out of the reboot cycle, couldn't even do a factory reset from the boot menu without it restarting. Called tech, they had me do the *228 trick, but it restarted during the test call and they are shipping a replacement overnight. We'll see if that works. This is a great phone, but this is a really annoying issue.