So I've been a member for 2 years and when I thought i knew it all I guess I don't. So this iPhone I have it says "applecare service" on the back case so I believe it was refurbished or something. I tried quickpwn with 2.0.2 FW version added cydia installer boot logos and unlocked it but I put another sim card in and it says it needs and At&t sim card. Why don't it unlock? it's already jailbroken just it doesn't unlock it.