I was trying to use the my verizon app on my Thunderbolt to check my usage and it says it wants me to preform a firmware upgrade. I go and do that and it will download it to the phone and when it's done it will turn off. It will come back on and start updating until a triangle with a ! in the middle of it with the android guy below it comes on the screen. I have to clear the cache and reboot the phone or it will shut off everytime if I don't. I don't know what is going on. Has anyone on here have this happen to them before and is there a way to fix it. Please help. Thanks.