How to remove jailbreak on my iphone through itunes?

I have an iphone 4 and i wanna remove this jailbreak

This video should help you

  • Would backing up then restoring an iphone remove a jailbreak? Due to the recent release of IOS 7, i plan on updating my iphone 5(ios 6.1.2) but it is jailbroken. Would backing up then restoring my iphone keep all my pictures and app data while removing the jailbreak? If not what is your best recommendation for me to do. Would really appreciate an answer thanks!
  • If i jailbreak an iphone can i unlock it then remove jailbreak? So my Mum just got given an iPhone 4 by her brother, she needs to unlock it to be able to use it with her network but she doesn't want it jailbroken and doesn't won't to have to pay for it… So if I use jailbreak to unlock the device could I then remove Cydia and it would still be unlocked?
  • How to restore my iPhone to remove jailbreak and then unlock it? I want to remove the jailbreak from my iPhone by restoring it however it isn't unlocked to 3 so if I do it, it will ask for a sim which I don't have. Is there a way to restore it then unlock it to 3 without jailbreaking it? It is a iPhone 3GS by the way. Ffs just went on my phone and its stuck on the apple boot logo, the power button don't work so i can't turn it on or off and its not being recognised by itunes!
  • How to remove jailbreak from my iphone 4s 6.0.1? My cousin jailbroke my phone and now its turning off by it self, and some applications are not opening. so i wanna reamove it with out losing anything, is that possible? if no, tell me how to remove it.