Downgrade 1.1.1 iPhone firmware instructions
If you went ahead an installed 1.1.1 only to end up with a Jonathan Ive-designed paperweight at the end of it, you’ve got a couple of choices: go to your nearest Apple store, tail between your legs, and hope they take pity on you and fix your iPhone somehow, or turn to your friendly neighbourhood hack-community and see what functionality they can restore. Over at the Apple-Touch forums we’re pointed in the direction of some instructions that promise at least a partial restore; in this case, use of all but the GSM functionality unless you’re using the original AT&T SIM.
So, if you can make do with WiFi connectivity, this might just be your salvation; basically it downgrades all but the baseband to firmware version 1.0.2 - not perfect but we’re told that the team are still beavering away. Full instructions after the cut…
Original post by Chris Davies