The limited time offer requires both smartphones to be purchased on AT&T Next with a qualifying plan. The first device can be a new line or an upgrade, while the second device must be a new line and purchased on AT&T Next 24.
After three bill cycles or less, AT&T said customers will start to receive up to $650 in bill credits spread out over 30 monthly payments. The first payment will be a lump sum of any AT&T Next payments to that date. Tax is still due on both smartphones, which must be from the same manufacturer, upon purchase.
Last month, T-Mobile announced a similar "BOGO" promotion that offers qualifying Simple Choice customers half off all iPhone 6s and iPhone 6s Plus models, or any iPhone 6 and iPhone 6 Plus, with the purchase of another iPhone of equal or greater value. The savings are applied instantly at the point of sale.