I have a T889 which had CM10.1 nightly installed. It had significant issues (no bluetooth streaming tags, video problems in some apps) so I wanted to try stock. I restarted in recovery mode and installed T889UVALL4 deodexed, cleared the cache and the dalvik cache and restarted. Now my phone is stuck in a reboot loop. What did I do wrong? Did I do something REALLY stupid?
Per the instructions, wipe the phone and reset to defaults. Happened to me too. Luckily, my backups are good, so the only real chore for me is setting up my screens with Nova Prime.
YMMV.