Get a $150 discount toward a Lumia 950/950 XL when you trade in a Lumia 920, 925 or 1020
The offer is valid in the USA and Canada
If you live in the United States or in Canada, you will be able to buy a new Microsoft Lumia 950 and 950 XL with an up to $150 discount if you trade in a qualifying old phone. The three Lumia phones which are accepted are the Lumia 920, Lumia 950 and Lumia 1020.
All these three devices won’t be officially upgraded to Windows 10 Mobile, so Microsoft is offering owners of Lumia 920/925/1020 the chance to get a new phone at a reduced price by trading in their old phones.
The trade-in offer is valid until June 30. To get the credit, you need to go to a Microsoft store (or send the phone by mail) where the company will determine the amount of credit depending on the condition of the phone. Then the user will receive an email with a promo code that can be used at checkout.
Read more at the Microsoft Store web page.