Windows Phone 7.5 build 8107.571
| Build of Windows Phone 7.5 | |
 | |
| OS family | Windows NT |
|---|---|
| Version number | 7.10 |
| Build number | 8107 |
| Build revision | 571 |
| Architecture | ARM32 |
| Build lab | WM7_Main(mojobld) |
| Compiled on | 2011-12-07 |
Windows Phone 7.5 build 8107.571 is an unconfirmed build of Windows Phone 7.5. It was claimed to be found on a Lumia 900 F2 engineering machine, and was supposedly uploaded to the Chinese website BetaWorld on 30 January 2023.[1]