My Thunderbolt is shutting itself off every few minutes, even in Safe mode. I installed ICS the day it came out, and the phone has been fine for months. The other day I got a message that about 15 apps needed updating, quite a few requiring permission to not let phone sleep. I believe that is when the issues started. I have read various threads online and many talk about bad app if the phone is OK in safe mode, but since mine shuts off then as well I'm stumped. There certainly seems no easy way top cure this, and I am certainly hoping I don't have to uninstall every third party app on the phone - what a headache that would be. Anyone have thoughts on how to remedy this?