Okay so my friend jailbroke my iPhone a while back and its been jailbroken ever since. Been about 4 years now or so. Cant get iOS updates or anything, I was just curious as to how I can un-jailbreak my iPhone back to normal. Currently have a iPhone 5s. Thanks
Connect your iPhone to your laptop/desktop computer, then open iTunes and click the device icon. Now you will need to find a button that says "Restore Backup.." This will delete everything from the jailbreak but you won't lose any of data.