iOS 4.2.1 Jailbreak Update to iTunes 10.1 Recommended

Yesterday, the iPhone Dev Team released the iOS 4.2.1 jailbreak in the form of Redsn0w 0.9.6b4. Since its launch a few problems have been noticed while running the tool. The Dev Team now recommends that an update to iTunes 10.1 is best and for those running the tool on Windows 7, it’s recommended that you run the app in XP compatibility mode.

Also, there seems to be some who are unsure what a tethered boot is. For those running newer hardware on iOS 4.2.1, when you jailbreak it will require a tethered boot for now. This means that every time your iPhone reboots (ie the battery dies or it crashes), you’ll need to be next to a computer and re-run redsn0w to boot your device.

It isn’t known how long tethered boot will be required for, but until they figure that out you either need to live with tethered or keep on iOS 4.1.

Take a read of all the updates on the Dev-Team blog over here so that you get an understanding of what you are getting in to. Also remember that if you want to unlock, stay on iOS 4.1 for now. If you run an iPhone 4 then an unlock isn’t possible at the moment. It is also not possible for the 3G and 3GS on 4.1 (unless an older baseband is used), but the 3G and 3GS unlock is expected sometime this week.

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