Apple iPhone 3G
3.0 > 2.2.1
i updated to 3.0 , but i dont like it and want 2.2.1 back . how do i go back?
you got to download teh bios for it... i found some on websites that do jailbreaking, but the ones i found require a subscription... 😕
once you get the bios its as easy as just replacing the current bios in the root folders