I currently have AT&T but with their Unlimited Plan being more expensive than Verizon's or T-Mobile's I want to switch carriers to Verizon using iPhone Upgrade Program and get the iPhone X as soon as it's available for pre-orders. I also want to keep my number as I have had it for something like 15 years plus. Has anyone done both a number port and carrier switch on pre-order with iPhone Upgrade program? Does it not matter since theoretically they will just send me a Verizon phone, then I will work with Verizon on the switch? I assume I'll just choose Verizon on pre-order then? I think the X will be hard to come by if not pre-ordered immediately so want to make sure I have all my ducks in a row prior to 10/27.