Keep one for yourself and surprise someone with the second one.
Brad's Deals Editor Michael,
New customers can buy one 64GB iPhone 8 and get a second one for free when they purchase it on an AT&T Next or Next Every Year plan at AT&T. You'll need to get two of the 64GB models in order to use this deal. The total credit will be equal to the value of the second phone and will be distributed evenly across the duration of your selected plan on the second phone's device payments. This is the only BOGO offer we could find for the iPhone on AT&T, so this is the best deal for anyone looking to get multiple phones on a Next plan. Existing customers can also get this deal if they purchase two new phones and open a second line of service with a Next plan. Shipping is free and sales tax is charged in most states.