I'm planning on getting a AT&T Samsung Galaxy S4 SGH-I337. I've been looking through the android development thread and came across some some threads with TWRP and some other root methods. I heard that AT&T came out with a few new updates for the phone that effects some of the root methods and I don't know which one or if any. I know how to flash recoverys and ROMS through Odin, but I have no clue how to unlock the bootloader for the GS4. I also don't know any other methods of flashing recoverys or ROMS outside of Odin. BTW I plan on flashing cyanogenmod 11. I've only owned samsung phones. I'm new to this phone so I would appreciate any help.