Windows Phone 8.1 build 14027
| Build of Windows Phone 8.1 | |
 | |
| OS family | Windows NT |
|---|---|
| Version number | 8.10 |
| Build number | 14027 |
| Build revision | 34 |
| Architecture | ARM32 |
| Build lab | WPB_CXE_R1 |
| Compiled on | 2014-02-21 |
| Base build | |
| 6.3.9651.0.winbluephone_rtm.140217-1825 | |
| About dialog | |
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.