How to unjailbreak Iphone 4?

I have a jailbroken iPhone 4 running ios6. I wanted to remove it but can't find anywhere online on how to. I received the phone from my cousin and wanted it off… Please give me direction. And it was jailbroken from Redsnow? Best answer to whomever!

Added (1). Wait for an update? An update will erase the jailbreak? Cool!

Wait for a new iOS update, or take it to an Apple store and have one of their staff members factory restore it.

Simply go to iTunes and back up your stuff. Cool thing about this is that iTuens backs up only non-jailbroken items such as music, and apps bought from the App Store. Then once you are done with that. Click on your iPhone in the iTunes sidebar and click restore. After the iPhone is done restoring, you will have an iPhone 4 running only a clean iOS 6.0.2 ( I believe that is the latest one)! Voila!

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