Looking to upgrade one of the phones on my Verizon account. It's an iPhone 6 and starting to shows its age so I want to get a replacement that's not a plus size. I think the X is about as large as a screen I can handle and prefer to get a model that can take portrait photos. So it seems like the X is the best option. If I go this route should I buy through Verizon or Apple? Any benefits from buying through one or the other if I want to trade in my 6? Also I don't mind paying for the entire phone outright or monthly payments.