Windows phone

Windows phone is a series of proprietary smartphone operating systems developed by Microsoft. Its original release, Windows Phone 7, was a revamped version of the previous, Windows CE-based Windows Mobile platform. However, it was incompatible with the legacy platform. Windows Phone's user interface was designed to contrast with its competitors, utilizing a design language code named "Metro" which de-emphasized iconography and skeuomorphism in favor for flat, text-based designs. 

The platform also featured concepts such as "live titles" on its home screen that can display dynamic content, and "Hubs"-which aggregate content from various sources and services such as a user's local contracts, in combination with connected social networking services, into unified displays. Windows Phone also integrated with other Microsoft brands and platforms, including Bing, SkyDrive, and Xbox. Microsoft Office Mobile apps were also bundled with the operating system. 

Windows Phone 8 was released in 2012; it was incompatible with existing devices, but switched to a core system based on the Windows NT platform, expanded the platform's hardware support and functionality, and added expanded enterprise-oriented functionality such as storage encryption. 

Windows 10 Mobile was released in late-2015; it is no longer promoted under the Windows Phone brand, as it is intended to provide greater consistency and integration with Windows 10 for PC, including cross-platform applications via Universal Windows Platform, and the ability to dock supported devices to use a desktop interface with keyboard and mouse support.

The Windows Phone series had had poor adoption in comparison to its competitors. Lack of interest in the platform also led to a decrease in third-party applications, and some vendors ended their support for Windows Phone altogether. The most prominent Windows Phone vendor was Nokia, who exclusively adopted Windows Phone as its smartphone platform in 2011 as part of a wider partnership with Microsoft. Nokia's Lumia series was the most popular line of Windows Phone devices, representing 83.3% of all Windows Phones sold in June 2013, and Microsoft acquired Nokia's Mobile business for just over €5.44 billion in April 2014, forming the subsidiary Microsoft Mobile under former Nokia CEO Stephen Elop.

Windows phone is a family of mobile operating systems developed by Microsoft for smartphones as the replacement successor to Windows Mobile and Zune. Windows Phone features a new user interface derived from Metro design language. Unlike Window Mobile, it is primarily aimed at the consumer market rather than the enterprise market. It was first launched in October 2010 with Windows Phone 7. Windows Phone 8.1 was the last public release of the operating system, released to manufacturing on April 14, 2014. Windows Phone has been succeeded by Windows 10 Mobile, with the Windows Phone name being phased out in favor of branding the platform as an edition of Windows 10.