To take advantage of the offer, new customers need just to purchase both phones on the Equipment Installment Plan and activate them on a T-Mobile ONE Unlimited plan. Existing customers can just choose the phone on the Equipment Installment Plan (EIP), then add one voice line + unlimited data to this plan. If you get on the EIP deal, you have 24 months to pay the device off and if you do cancel your service, any remaining device balances will become due.
The BOGO offer comes in the form of an online rebate, so after getting everything activated you can submit online for a refund of up to $750 via prepaid MasterCard. As an added bonus you can get a free Insta-Share Projector Moto Mod ($299.99 value), as well.
Go to motorola.rewardpromo.com by 9/25/17 to redeem offer by submitting proof of purchase.