I am looking to buy an iPhone 4 from the secondary market. I currently have an iPhone 3GS. Can I just replace the sim on the new iphone with my current sim? Or is there something else that I need to do?
IPhone – Moving Sim Card from One iPhone to Another
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Best Answer
Unfortunately the iPhone 4 has a microsim card, so there is no moving your sim from pre iPhone 4 iPhones to iPhone 4. Most likely you can get one of these from your carrier.