I have ordered a iPhone 5s from Verizon and it will be delivered Monday. During the purchase process online, it asked me if I want a new SIM. I said yes. On the FedEx website where I view my tracking info, it has SIM card and the iPhone 5s listed as two seperate products in the same box. Will I have to insert the new SIM card into the new phone? Reuse my old SIM card?