Originally Posted by mevans336
I have purchased two unlock codes for my AT&T HTC One form two different companies - both were the exact same code. However, when I enter the unlock code it says it is invalid. I have unlocked the bootloader and changed the ID so I can install vanilla Android. Cold this be why it is not working? Should I set everything back to the defaults, restore the AT&T ROM, and then try to enter the SIM unlock code?
There's a stock AT&T ROM somewhere in the development section,backup current build flash the rom then use the code. when you successfully unlock it go back to recovery and restore your vanilla build. You will keep the unlock no matter what you flash.
If you judge a fish on it's ability to climb a tree it will spend it's whole life thinking it's stupid.