This is happening on my mom's phone as well. Galaxy Note 2 on Sprint. I never would have expected sync being on or not to be the culprit, but stumbled upon it last night. With sync off, everything works. Within 15 seconds of turning it back on the reboot loop starts. Even in safe mode the reboot loop continues.



The only account she has enabled is her Google account. I'm having her look for her password now so that I can try reconnecting it. Otherwise it's a fully stock phone. She couldn't root it or side load apps if she had wanted to. Will let you know if I find anything. Sounds like there are some preliminary reports that a reset will fix it, but I'd prefer not going to that extent if not required.