We finally have good news for those AT&T HTC One X users out there who like to root and flash ROMS.
A member of XDA-Forums named grankin01 has come up with an unofficial way to unlock the bootloader on HTC’s uber phone. This is particularly excellent news, considering we have no idea if HTC is going to release an official bootloader unlock tool.
Grankin01’s method of unlocking the bootloader basically tricks the AT&T version of the phone into thinking it’s a Rogers HTC One X, a version that does have an unlocked bootloader. If you are proficient at rooting and command line, you shouldn’t have much trouble with this method; otherwise, proceed with caution because it can be a bit tricky.
The phone needs to be rooted before the steps can be performed, and you also need a hex editor. As usual, remember to back up your data before attempting the operation, because it will all be erased!
Follow the instructions below and you’ll finally be able to flash custom ROMs onto your device. If you give it a shot, let us know how it goes!
All the instructions necessary can be found on this XDA thread. Happy unlocking!