I've decided that I'm switching carriers when the iPhone 6 comes out. We just moved to a new area and I have lackluster coverage with AT&T at my house, but Verizon LTE comes in perfectly. I got the iPhone 5 on launch day (September 21st), so my contract ends on the 21st this month, but my newest billing period just began yesterday. The only problem with getting a Verizon account is that I'd like to pick up the phone on the 19th... but I don't know what will happen if I happen to port my AT&T number over on the 19th, two days before my contract officially "ends" with AT&T. I don't mind porting my number over on the 19th and then waiting two-three days to cancel, as my current billing period wouldn't even end until October. Any advice from those who have ported numbers in the past? I've had AT&T since the very first iPhone came out, so I'm very new to this process.