Quote: Originally Posted by Dinesh
Yes try performing a factory data reset. It should help.
I did it, performed the factory reset and the difference is night and day. The HTC Thunderbolt is once again very quick and responsive even though it's a single core CPU.
Battery life is back to normal, too. No more having to recharge (or change battery) during the day.
Probably should have reset the phone after the OTA OS updates. The OS has been updated twice in the past 3.5 years. Phone is not rooted.
I'm going to be more circumspect in what apps I install, and perhaps wait a day or two between installs to see how each one affects performance.
Maybe this phone will last another 3.5 years?