Since the 5, all iphones can do most GSM networks.
I don't know if they can port at the apple store,b ut you can buy it, then call verizon and port the number over.
you can use a verizon iphone on any carrier except sprint, tho you may not get optimal spectrum coverage on t-mobile (not that I think you'd use t-mobile)
That makes complete sense to me. Montreal's window is closing, and Shea Weber is definitely better than Subban today. Nashville gets a personality, which they need. Win/Win.