1. Does anyone know if we're replacing an existing iPhone on our Verizon 2 year contract by paying full price and we did store pickup, when we pick it up in store, do we have to actually activate the iPhone 6+ in store, or can we wait to activate it when we get home? Do they just scan the barcode on the box and it transfers our number? 2. Also, would we need to switch SIM cards, or how does this work?