A few screens from Windows Phone 8.1 (left to right): Home screen, Action Center, and Cortana.

Windows Phone 8-1 logo

The official wordmark of Windows Phone 8.1.

Windows Phone 8.1 is a mobile operating system by Microsoft, released on July 15, 2014. It is the predecessor to Windows 10 Mobile, and the successor to Windows Phone 8.


App EcosystemEdit