Why does my ATT sim card not work with my apple iphone 3g 16g (bought from ebay)?
I have apple iphone 3g and an old att sim card.bought the phone from ebay. i thought it would be just plug and play, but it doesnt. the seller told me that i need to unlock it, but what i know is that when you pop your ATT sim card to iphone 3g,it will work immediately. Does it mean the phone is not activated yet? If so, how can i activate it?thanks guys!
Btw, my ATT sim card is still working, i just wanna transfer the sim card from old phone to iphone 3g
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