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Download Windows 8.1 Update (KB2919355) from Official May 05, 2014 Install the Windows 8.1 Update (KB 2919355) - Windows Help Aug 31, 2016 Update to Windows 8.1 from Windows 8 - Windows Help
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Phone Update on Windows Phone 8.1 - Windows Central Forums Dec 11, 2016 Microsoft reveals features in Windows Phone 8.1 Update 1 Windows Phone 8.1 Update 1 is aimed toward developers, according to The Verge, but any user with a Windows Phone can download it by registering for an account through Microsoft's App Studio program. Windows Phone 8.1: How to Update using Preview for Developers? Apr 19, 2014