كيفاش نعمل upgrade للايفون

do what ennar said, you have to restore in DFU mode with le 3.1.2 IPSW, you can download it from here
www.felixbruns.de/iPod/firmware


surely if you are an official customer(at&t...) you don't have to unlock your phone, only jailbreak with blackra1n RC3 after restoring

advise: no sms language on the forum, these are the rules


ps: you have to upgrade to itunes 9.0.2
 
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