Does the Verizon iPhone 4s use a SIM card? A relative is going to sell me his Verizon iPhone 4s because he recently upgraded to an iPhone 5. If it does use a SIM card, what will I need to do so that I can move my Verizon account onto his old phone? Can I do this myself without having a Verizon associate do this? I have never transferred an existing wireless account onto a used phone before.