Nokia X family

The Nokia X family was a range of budget smartphones that was produced and marketed by Microsoft Mobile, originally introduced in February 2014 by Nokia. The smartphones run on the Nokia X platform, a Linux-based operating system which was a fork of Android. Nokia X is also known generally as the Nokia Normandy. It is regarded as Nokia's first Android device during the company's Microsoft partnership and was in the process of selling its mobile phone business to Microsoft, which eventually happened two months later.
The Nokia X devices heavily resemble the Asha phones, and also contain some Lumia features. They have a single "back" button like the Asha 50x and 230. A "home" button was added to the X2 series when they were released in June 2014. They are primarily targeted towards emerging markets, and never made its way to Western Europe or North America.
Nokia CEO Stephen Elop called it the Nokia X family during an announcement, possibly to distinguish it from the unrelated Xseries that ran from 2009 to 2011.
In July 2014, Microsoft Mobile announced the end of the X range after just five months (as well as Asha and Series 40) in favor of solely producing and encouraging the use of Windows Phone products.