I am new at this, I have a Rooted ATT LG G PRO (E980) on 4.1.2 Software E98010p on MetroPCS, and i have been trying to upgrate to Kit Kat with no success, i try the OTA but says its not registered. i would like to know if there is a way i can download it thru USB or what is the easiest way to download KITKAT...Thank you