After being updated last month one would assume that any issues plaguing the HTC Thunderbolt would be fixed however, while a few things may have been taken care of one problem still remains. Random reboots have been a sore subject amongst some Thunderbolt owners and are still present despite the recent update. According to this leaked internal screen shot your problems may be coming to an end in the near future.
While there’s no short-term fix for the bug Verizon and HTC are working on a solution which will be included in the next maintenance update. Although this is a problem that many Thunderbolt owners are experiencing, Verizon has been reported to be giving certain users “new”, or like-new, phones if the reboot are unbearable (and you complain a lot). Hopefully we’ll see an update coming by the end of this month, if not sooner.
Source: Android Central