HTC promised the HTC Thunderbolt would get Gingerbread by the end of September. So far that target isn’t looking good, but we have another Gingerbread build (RUU 2.11.605.2) for you to try.
We aren’t sure if this will be the official build, but most likely it won’t. It can be flashed by non-rooted or rooted uses, but remember since this is a RUU file, your phone will be completely wiped, and you could fall off the update path.
To flash follow these instructions:
- Download this file and rename it to PG05IMG.zip.
- Drop the file onto the root of your SD card (not in a folder)
- Power down your device.
- Hold Volume Down + Power to boot into the bootloader. The file should automatically be detected and the flashing process will begin.
- Once everything finishes, choose the reboot option