Ok I have a SGH-i317 on att and my problem is this. So I went to update my phone through the OTA from att and had to get the 4.3 bootloader for the DN3 rom I installed. Messed up a couple files and had to downgrade back to 4.1.2 ( this is where things went to hell) it booted fine on stock 4.1.2 until I let it do another OTA then the phone froze and will now only let me enter download mode. I checked probably 10 threads pertaining to my problem like this one. http://xdaforums.com/showthread.php?t=2589891 and I can't get it off the initial start up screen. I can still enter download mode but thats it. I've tried flashing the stock 4.3 through Odin and a custom recovery from the link above I even tried to flash a pit file and a bootloader file but the bootloader file comes back in error. Any help would be greatly appreciated.