Little noob on this type of things..i am using SGH-I337 stock 4.2.2(MF3) and i am stuck on it.. although i am using AT&T product some how managed to unlock sim and using it in INDIA .Samsung Kies is not helping in stock updates and some one Let me know how to stock update now..!!... searched whole web couldnt understand anything.. properly..want to be on stock 4.3 ...Tnx in Advance .. plz help Newbie!!