My Thunderbolt is always shutting off 3 - 4 times a day extremely frustrating and the update that was pushed out a
couple of days ago didn't help things either.
Have had to reactivate an old phone as I need to have something reliable and I am sorry tohave to put my Thunderbolt in the drawer. It seems that VZW and HTC are unwilling to recognize the issue. All they need to do is a web search to see that this is happening to lots of others.
see this thread as well
hey new android users.. delete task killers,lookout,juice defender
format sd card, format phone.. try adding one or two apps a day
enjoy your phone again
I would first try booting your device in safe mode which can be found here> http://support.verizonwireless.com/clc/devices/knowledge_base.html?id=40136
Try running your devic ein that mode for a day or so to see if issue persists. If all is fine then it is something on the device causing the issue. If that doesnt resolve the issue then as a last resort I would say perform a factory data reset found here> http://www.knowyourcell.com/htc/htc-thunderbolt/thunderbolt-guides/726984/how_to_hard_reset_the_htc_...
Just remember to back up your data first as all except what is on your sd card is GONE....
My Thunderbolt shuts off nearly every time I use it. I will be on the phone talking and without warning it will just shut off. I'm interested in trying to get a new battery, like some have suggested, but my battery didn't look warped. I really hope it works. After my phone shuts off (even sometimes with 80% battery) I cannot restart it unless it is plugged in. This is SOOOOO aggravating.
I have had a TB for over two years. If you have that issue, it is either an App issue/conflict or you have not done a master reset since the last update.....
Follow the instructions above to determine if apps are an issue