The Microsoft Stores are now accepting a variety of phones, including iPhones, Blackberry and Samsung handsets, as trade ins for gift cards up to $350.
The deal is open to everyone and businesses can also trade in multiple devices simultaneously.
Market value is decided by Clover Wireless, which is a company that provides private label trade-in, buy-back and repair services. Users will need to buy a Windows Phone or tablet first, and on showing proof of purchase will be given a pre-paid visa card as a rebate within 60 days.
Read more about the new promotion here.