Try this. After calling vz I was connected to tier 2 tech support and they had me factory reset the phone. I always thought the only reset for this is in the bootloader menul. After resetting the phone the way they suggested yesterday, my phone has not rebooted itself yet. Prior to the reset it was rebooting 3-4 times a day. The option to reset is found at settings, sd & phone storage and then factory data reset. Make sure you remember your gmail account and password because you'll be losing all of your data. My battery life seems better also.
Hope this helps others as well and looking forward to hearing back.