A new thread at XDA contains a leaked Thunderbolt ROM that is believed to be the upcoming Verizon OTA update. XDA member jcase stated “this is a full RUU, and is likely the first OTA update.”
The ROM contains a new radio that dramatically improves the GPA, 3G / 4G transitioning, battery fix, and quiet video issues.
The update will wipe your phone, so be sure to back up all your data before flashing.
Be sure to check out the thread at XDA here.
