said by MertJen :If you where a customer with the phone you don't need to supply any receipt. Just the number that it had when you had on the Iphone on att contract and the imei number. If you where never a customer, will then you need to supply the receipt
"In a blog post, AT&T says they'll unlock any device provided certain conditions are met:"
I tried to unlock an old Iphone 3Gs over the weekend.... submitted the info on the website. Got a response...
"Thank you for contacting AT&T Customer Care about unlocking your iPhone. Please retain your Request Number for reference. In order to process your unlock request, we must receive a faxed copy of your original receipt"
Origianl receipt? I didn't hang on to that. I figured they would find a way to deny it.