ok so i just got rid of my blackberry unlocked bold and sold it to a guy who has t-mobile. He traded me for an apple iphone 3G with software 3.1.2 on it. The phone is unlocked and was working when we met, I put in my sim card and now it is saying invalid sim card, (please insert a valid sim card with no PIN lock on it to activate your phone though itines). My sim card is good, I even went to att and got another one and still doesnt work. I'm literally new to the iphone so I need some help!!!. Thanks
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