AT&T Buy one get one Promo iPhone Xs
I'm planning to preorder the iPhone Xs on my family plan. There is a current line on AT&T Next to upgrade, that line will get the iPhone Xs and a new line added with the iPhone Xs to get the $700 in credits.
1. How can I use this offer? Since its pre-order can I place the pre-order by going to the Apple store or has to do everything online?
2. Do we need to order both the iPhones at the same time on the same order to get the credits?