I got the new ota update(jan 2015). It downloaded but stopped after 3% with error. I am rooted with only stock. No special roms, nothing. No recovery, and no system apps deleted. I downloaded everything I need to flash stock firmware and tried it. While running flash, it stops and says usb isn't connected, to pull it out and reconnect. I did this over and over. I need some major help! Someone please help!