Introduction
The Nokia Lumia 800, announced in October 2011 and released in November of the same year, marked Nokia's significant entry into the Windows Phone market. As a pioneering device in this category, it adopted Microsoft’s Windows Phone 7.5 Mango operating system and offered an upgrade path to 7.8. Although it has since been discontinued, the Lumia 800 remains notable for its design innovation and integration of Nokia's mobile technology with Microsoft's robust platform.