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Hi! I just bought a Nokia 5310 Xpress Music Blue phone from Orange Romania. I checked its firmware version , it's 3.63. Now, I found some info on the net that says that the newest version is 5.81 http://forum.gsmhosting.com/vbb/showthread.php?t=517041... But when I installed NSU it says there is no update for my phone.. The page linked above has an tutorial for the installation or the 5.81 firmware... I heard it improves some things at the telephone... But if I follow the tutorial's specification I will make my warranty null... So? Who had problems like that? How can I update my Nokia 5310 with an official firmware?