You would have to go to AT&T or where ever your cell plan is held and have them restor it but if you have not backed it up at all everything will be deleted this is the only thing you can do I had to do it with my iPhone. also you can not restore it on your computer because you would have to unlock it first.
1 year ago
Last edited at 5:18PM on 2/7/2013
You have to connect your iPhone to your computer. In iTunes, select iPhone in the Devices list, then click Summary at the top of the screen. Click “Check for Update.” Click Restore, you will lose your stuff but you won't have it either way if you can't unlock it. I'm guessing you don't have jailbreak