Originally Posted by ShroudOfAgony
Install a custom recovery (TWRP or CWM) then find a ROM compatible with your phone.
They're on i337, TWRP or CWM won't work on 4.3. They'll either need to root and use Safestrap and the ROMs from the index in the general section, or use ODIN to go to stock 4.4.
Sent from my SGH-I337 running BlackBox 3.0
Current Device: ATT Samsung Galaxy S4 (i337)
Droid Bionic (GSM Hacked)
HTC Inspire 4G (Desire HD)
HTC Dev Phone 1 (Dream/G1)