Lumia series

Nokia Lumia, later rebranded to Microsoft Lumia, is a discontinued line of mobile devices that was originally designed and marketed by Nokia and later by Microsoft Mobile. Introduced on 26 October 2011, the line was the result of a long-term partnership between Nokia and Microsoft—as such, Lumia smartphones run on Microsoft software, the Windows Phone operating system; and later the newer Windows 10 Mobile. The Lumia name is derived from the partitive plural form of the Finnish word lumi, meaning "snow".

The series debuted with the Nokia Lumia 800 and the Lumia 710 smartphones. In April 2012, the first high-end flagship, Nokia Lumia 900, was released in the US in partnership with AT&T, backed by a major marketing push. Its later flagships included the Nokia Lumia 920, 925, and the first phablet-style model, Nokia Lumia 1520. However, its most successful model was in the lower-end, the budget Nokia Lumia 520, released in April 2013. In July 2013, Nokia introduced the Lumia 1020 with a 41-megapixel sensor, considered to be one of the most iconic Nokia handsets. One tablet computer was also released in the Lumia line, the Nokia Lumia 2520, running Windows RT.