Windows Phone 8.1 build 14027

8.10.14027.34.WPB_CXE_R1.20140221-2051
Build of Windows Phone 8.1
Screenshot
OS familyWindows NT
Version number8.10
Build number14027
Build revision34
ArchitectureARM32
Build labWPB_CXE_R1
Compiled on2014-02-21
Base build
6.3.9651.0.winbluephone_rtm.140217-1825
About dialog
WP8.1-14027-About.jpg

Windows Phone 8.1 build 14027 is the earliest known build of Windows Phone 8.1 Update 1. This build was originally shown running on a Lumia McLaren prototype on an Ebay listing. Later, this build's Manufacturing Mode OS was found on another Lumia McLaren (RM-1001, 059V7N3) prototype and shared on the BetaWiki Discord server on 6 November 2024.