the step-by-step instruction. But unfortunately, after over 2 hours updating and restoring, the iTune pops up a message and says I need to input passcode. Didn't work. 
Has anybody tried and worked?
This is actually the same site I went and followed
所有跟帖:
                    •                    
                    你用的那台電腦是你最開始sync的那台麽?
                     -奉旨泡妞- 
                    ♀                    
                        
                    
                                                            
                        
                    
                                        
                    
                    
                                        
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                        12/01/2008 postreply
                                                16:25:16