I rooted my phone (SGH-M819N) using odin backed it up using TWRP installed CM11 with TWRP. And it went fine but i did not. have internet I tried changing AP to IPv6 under Tmobile and Metro but still no internet so I used TWRP to restore back to stock firmware but it hangs at samsung splash screen can anyone help me out or get stock firmware working again. I can still access TWRP and CM11 still installs fine. any ideas or help would be great