Those of you that own an iPhone have no doubt noticed that there is an update for your firmware. For those that have hacked your iPhone and decided to risk upgrading, Apple kept true to their word. You've now likely got yourself a sexy looking brick. Don't worry, all is not lost.
The new 1.1.1 upgrade did exactly what Apple promised it would do, it bricked your hacked phones. However, the hacking community has been hard at work and fixes have already been developed. Granted, they don't completely fix things, but at least you get most of the functionality back.
The instructions below will take almost everything back to the 1.0.2 firmware. Unfortunately, it's still not perfect, but I'm sure in the next couple of days we'll be seeing a better solution.
**Make sure you have a copy of the 1.0.2 firmware stored in: youruser/library/iTunes/iPhone SoftwareUpdates
**Reboot iPhone holding the top button (power) and the home buttons.
**Release the top button 10 seconds after that, right after the screen goes dark.
**The iPhone screen will appear to be off. Now start iTunes manually anyway.
**iTunes will tell you it has found an iPhone in “restore mode.”
**Press option key and then click the restore button.
**Select the 1.0.2 firmware .ipsw file from here: youruser/library/iTunes/iPhone Software Updates
**The phone will restart and there will be an error out at the end. Don’t worry. It was bound to happen.
**Launch the latest iNDpendence (Mac-only for now.)
**Jailbreak the phone using a expanded 1.0.2 file (to do that, make a copy of the 1.0.2 ipsw file, then select “Open with…” from the Finder’s action menu and use BOMArchiveHelper.app (it will appear in the menu.) The ipsw are really .zip files.
**It will flash all sorts of errors, but don’t worry.
**Activate the phone.
**It will show the SIM error but now the iPhone will work again with your Wi-Fi and your apps.
Downgrade 1.1.1 iPhone firmware instructions [via MyiTablet]