iphone locked please help?

Izzy

New member
k so my friend coincidently updated his iphone 3g to 3.1.3, i can downgrade the firmware but the baseband is stuck at 05.12.01 and the bootloader is05.09 so fuzzyband doesn't work... if anybody could help that would be greatly appreciated thanks:)
its at 3.1.2 and where and how do i create a custom firmware?
restored to 3.1.2
 
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