Windows Phone 7

Windows Phone 7 is the first release of the Windows Phone "mobile client" operating system, released to the world on 2010-10-21 and to the US on 2010-11-08. It received many massive updates, the last update being Phone 7.8, which was released on 2013-01 and added a few new features backported from Windows Phone 8, such as a more customizable start screen. Microsoft ended support of Windows Phone 7 on 2014-10-14, and was succeeded by Windows Phone 8; released on 2012-10-29