Update: Checked my NEXT Installment plan details and it shows me 'Contract Pending' for APPLE IPHONE X - 256 - SPACE GRAY and also shows my APPLE IPHONE 7 PLUS - 128 BLACK as 'Contract Updated' so I think that is all good news. Now the stressful watch for changes to status and shipping!
Had lots of issues with mine. On the Next plan and wanted to trade in my IP7+ toward my IPX, however I could only get an option to pay off my remaining balance and then pre-order after waiting 8 minutes in the queue. I figured I would do this to get the pre-order done, then sell my IP7+ if I had to, however, could not get any credit card to accept. My CC flagged it for some reason, I am guessing all the attempts, even though the ATT website was stating the card information was wrong (it wasn't). Eventually I checked on my CC website and had to authorize the charge (showed 3 times), however by this point I was trying through the Apple site, which said I could upgrade via trade it. So at this point, I re-checked the ATT website, which was not allowing me to upgrade with ATT Next so I did. I think at this point I have paid off my IP7+ though, so if my wife does not want it, it will go to Gazelle or something similar who are offering $330, slightly less than the what I paid off..
The whole ordeal took nearly 40 minutes.
That being said, I got my order placed at 3:40:21 AM EST with an immediate confirmation email. Received my order status email at 7:51am EST stating Expected Delivery Date 11/3/17
Ordered Iphone X 256 Space Gray. Have previously gone through this pre-order process for ATT for Iphone 4, 5, 6P, and 7P
~Matt