Trying to unjailbreak my iPhone?

I want to "UN- Jailbreak" my iphone. So when I plug in my phone, it wants to "back up". If i back it up, and use that same backup after i restore my phone, will it re install cydia? Or only keep the "apple approved" stuff?

If you restore it via iTunes it will take off cydia (along with all of your other data) and restore it to factory settings.

Ya mate it wil keep only the Apple approved stuff don't wory

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