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unlock it... i've read multiple cases of people losing their AT&T service when using the pwnage software. i used it yesterday (1.1.4) after restoring my iphone... checked the unlock option... and my AT&T account works perfectly.
 
Actually, you don't need to unlock. I noticed that I didn't get service, but if you wait a few minutes, the service eventually comes back. Try to jailbreak your iphone with the boxes unticked, and then wait few minutes to see if the service comes back.
 
Yeah well if your phone will work fine with the stock 1.1.4 firmware, and it worked with it jailbroken whether it was ZiPhone, iPlus, iLiberty, then it should work just fine with a jailbroken firmware, so let it unchecked and you should be good to go...
 
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