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Read the pwnage guide.

Basically, restore iPhone in itunes.

Run the pwnage tool, pwn your phone, build custom firmware, restore with that custom firmware. Problem solved.
 
i m afraid

me too having a same problem....i have a iphone version 1.1.4....when i installed advance in my iphone....i found out that my setting icon has disappered so what to do plz help me?

:(
 
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