Can you add two phones to favorite and check out the same time?Pro Tip for those using the Apple Store app.
Prior to Friday morning, go through the configuration of the X you want and then press the little heart icon to mark this as a favorite. Now you can just go to favorites and select the phone and everything will be configured (storage, color, carrier option) and waiting for you to press Continue once it becomes activated.
Then you can cycle back and forth between Favorites and the phone to refresh.