iPhone 4S unlock failed
I bought a refurbished iPhone 4S about 1 month ago, and I've called AT&T to unlock my iPhone 4S, and finally they sent me an unlock successful notification email. However, when I tried to restore the iPhone 4S as per the instruction provided by Apple, it always said that the carrier of my SIM card is not supported.
"Only compatible SIM cards from a supported Carrier may be used to activate iPhone. Please insert the SIM card that came with your iphone or visit a supported Carrier's store to receive a replacement SIM card."
Since I'm not in US right now, and I don't have a AT&T Access ID, so I can't call AT&T directly nor launch a Wireless Chat with them.
Did anybody of you guys suffer such problem before? Do you have any suggestion? Thanks very much in advance.