I'm looking to buy an iPhone 5S, but I have to hold off because I'm switching to AT&T from Verizon. My Verizon contract runs through Oct. 18, and I think the ETF of like $120 would apply if I canceled a day early. But right now there's an obvious backup of the phones. I'm trying to figure out if I can order a phone a few days early and whether my number port -- the point at which Verizon considers my service terminated -- would happen the second I placed my phone order, when it was ready for shipment and my credit card is charged, or if it's when I get my phone home and activate it. If anybody has experience with this, I would appreciate it. I bought a 4S and ported my number instantly, so I don't know about this specific situation.