I have an Iphone that I lost my sim card for and my service was shut off by at&t. I was told without my sim card my Iphone was nothing more than a $400.00 paper weight and could not be unlocked or as they say "jailbroken" without my sim card. At&t will not give me another sim card without service. Maybe there is a generic sim card that will work with the phone? I dont know but would be eternally grateful for any suggestions or answers someone might have on this topic. thanks in advance.