Un-Jailbreaking
If you've decided the jailbreak lifestyle isn't for you, or managed to screw up your device software enough that you want to switch back, it's easy. (Also, if Apple will be handling your device for any reason, you should probably un-jailbreak it. Warranties!)
All you need is your device's latest firmware file, helpfully linked here.
All you need is your device's latest firmware file, helpfully linked here.
Oh, and make sure you've backed up—you're going to lose everything.
(This guide only applies to software versions 3.1.3 for the iPhone and iPod Touch, and 3.2 for the iPad. These are the latest versions at the time of posting, and newer software could break compatibility.)
1. Plug your device in, and open iTunes
2. Shift-click (Windows) or Option-click the "Restore" button in your iTunes device summary page. Navigate to the firmware you've downloaded, and restore.
3. Once this is done, iTunes will ask you if you want to set up your device as a new device, or from a previously stored backup. If your goal is to return to a life before jailbreak, you're probably going to want to restore.
2. Shift-click (Windows) or Option-click the "Restore" button in your iTunes device summary page. Navigate to the firmware you've downloaded, and restore.
3. Once this is done, iTunes will ask you if you want to set up your device as a new device, or from a previously stored backup. If your goal is to return to a life before jailbreak, you're probably going to want to restore.
And that's it!
