AT&T extends its BOGO offer to the iPhone series

A couple of days ago, AT&T announced a BOGO (buy one, get one free) deal on high-end Samsung smartphones, and now it looks like the carrier has decided to extend the offer to iPhones as well.

The deal, which is available to both new and existing customers, allows you to buy an iPhone at the full price and get a second one for free. AT&T does not limit the promotion to a specific model, which should mean that the offer is valid on all five iPhone models currently available at AT&T, the iPhone 6s Plus, iPhone 6s, iPhone 6, iPhone 6 Plus, and iPhone 5s. That's the offer in a nutshell, but the terms and conditions are actually a bit more complex, as we're about to explain.

Both iPhones must be purchased through AT&T's Next 24 equipment installment plan, which means that you'll have to pay for the phone in 30 monthly installments. The first iPhone can be either a new line or an upgrade, while the second must be activated on a new line. Furthermore, both phones must be added to one of the qualified plans, such as the Mobile Share Value plan which starts at $70 for two lines.

Customers also have to pay sales tax on both phones. AT&T may require customers to make up to three monthly payments on both iPhones before crediting up to $650 for the second device (this credit will be spread out across the 30 monthly purchases).

AT&T's iPhone BOGO offer is valid starting today and will last until the 31st of March. What do you guys think, is this a good deal or not?