Windows Phone 8.1
Windows Phone 8.1 is the first release for Windows Phone was released in winter 2013, Microsoft reach developed for Windows Phone 8.1 in the most for Windows 8.1, was released for public on July 15, 2014, after the end of support was until July 11, 2017. Microsoft until no support for security updates for Windows Phone 8.1, they have released in 2014, also Windows Phone 8.1 can upgrade to Windows 10 Mobile, by USB cable computer for Windows 10 Update.