Here was the steps I had to take!
a little background first:
- AT&T locked
- running HD20
- latest second to last firmware package
I was leaving AT&T so I called for the unlock code, got it from them, ported my number to T-Mo USA.
Unlock code didn't work, In hindsight it was because I was running a different radio (somewhere)
- upgraded to latest firmware package thinking that it would help the unlock code. Didn't work at all, was stuck in bootloader, or HTC screen. was able to flash recoveries, and boot into them, but they wouldn't actually "do" anything. Wouldn't install a rom, wouldn't root. Nothing. Tried flashing multiple roms with no luck, nothing "stuck"
Gave up for the night and grabbed the ol' myTouch 4G.
Only got 2 hours of sleep for a 10 hour work day :P
Today I was trying everything I could think of, RUU updates (Error 155), RUU zip, locking/unlocking the bootloader everything. Then I realized that I needed to RUU it and it had to have the matching CID. I fastbooted and CIDd the brightstar CID. Flashed the brightstar firmware package (second to latest one), and then ran the RUU successfully.
To top it off, the unlock code worked.
Hope this can help someone!
ROM: Iced Glacier, waiting for the CM7
Phone: Rooted MT4G
Twitter: Follow me!