Just bought an iphone 3g from a friend what do I do now?
I recently bought an iphone 3g from a friend who switched sim cards to use on his new palm treo instead. I asked him whether I should unlock the phone first before I use a att pre paid plan on it. He didn't know the answer. I have two questions:
1. Do I necessarily need to unlock the iphone first before I can put in a new att sim card for pre paid service?
2. Since my friend removed the sim card from the iphone and put it in his new phone could I just insert my new sim into the phone and start using it without accidently charging my friend's bill?
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