I had purchased an used verizon iphone so my wife and I would have the same carrier and phones. Well, when I purchased her phone, I had the shared plan. We arrived at home and I attempted to activate my phone using the "add a new line" feature. Seeing as you cannot remove the casing on the iphone, I cannot find the numerical code. It still has the previous owner's Verizon SIM as I heard Verizon will not sell only the SIM, and I have no idea how to register and activate the phone. If anyone could help me out, I'd appreciate it. I prefer not to have to unlock it and use another carrier as we have a shared plan.