My friend and I want to trade phones. He has a Note 3 and I have a HTC One M8. He said that in order to trade phones, we would have to transfer to "dummy" phones first and then take our phones to Verizon for them to reactivate for each of us. I don't have a spare "dummy" phone though. Do I absolutely need one in order to trade with my friend?? And if I do find an extra phone, can it be an Iphone or will it mess up my plan with Verizon? I'm literally using the "dummy" phone just for the trade....