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How do I restore to the normal non jailbroken state my jailbroken iphone 3G? Is there any permanent change when you jailbreak it?

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2 Answers

up vote 5 down vote accepted

All you need to do is plug your iPhone into iTunes, click on it under Devices:

Devices>iPhone

And click "Restore":

Click restore in iTunes

iTunes will make sure that you do actually want to restore:

Are you sure you want to restore?

Jailbreaking does not make any permanent changes; a restore will put your iPhone back exactly the way it was before you jailbroke it.

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There aren't any permanent changes made to your iPhone when JailBreaking. All you need to do is plug it into your computer, open up iTunes, and update/restore iOS normally. This will return it to a fully working, non-jailbroken state.

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