You can choose at the time of checkout to get the unlocked version or a phone that includes an AT&T SIM card.

The 128GB variant will cost $47 per month for 30 months, and the 256GB version will cost a flat $50 per month for a 30-month installment plan.

The unlocked version can work with AT&T as well as T-Mobile and Verizon

Best Buy is accepting preorders for the Duo, and you can get either the 128GB or 256GB unlocked phone now to secure it on release day