Unjailbreak Iphone: Error 1015
My iphone 3gs broke so I ordered a used one online and didn't realize that it was jailbroken. I've never had a jailbroken phone and have no interest in having one. So, when I got the phone I thought I'd just "erase all data" and restore the phone. Big Mistake. Now the phone won't boot and when I try to restore it I get a 1015 error. I just want a normal, unjailbroken 3gs. Is this possible? What do I do? I don't have any experience with this so if you have a suggestion, please spell it out thoroughly. Also, not sure if it makes a difference but the computer I'm trying to restore with is a mac.
iPhone 3GS