Originally Posted by
MannheimAlex
it is possible, but if you downgrade to 3.1.2, you just downgrade the firmware but not the baseband that came with the 3.1.3. if that is 5.12.01 you can try the fuzzyband app in cydia.
But not really know if it works or not...depends on the bootloader version you iphone got
Thanks mate, i it is indeed 5.12.01.
Trying fuzzyband now
EDIT tried it and it says "sorry downgrading will only work with baseband bootloader 05.08, mine is 06.02

nothing goes right for me
So if theres absolutely nothing i can do myself to unlock it would 02 be able to unlock it? dont mind giving them £15 if they will unlock it without all this hassle