I need to know if you can always use wi-fi instead of the 3g. I'm planning to get iphone from a friend and use it with my current att simcard. Would that work or att will found that I'm doing this. I just don't want to pay extra 30 bucks a month. and use wifi for internet.
I have a prepaid sim card from att, and I'm thinking about buying an IPhone from a friend. I want to know If I can just put my prepaid sim card into the Iphone, and would it work? will the charges stay the same?