Windows 10 Mobile build 9821
| Build of Windows 10 Mobile | |
| OS family | Windows NT |
|---|---|
| Version number | 6.4 |
| Build number | 9821 |
| Build revision | 0 |
| Architecture | ARM32 |
| Build lab | winmain |
| Compiled on | 2014-08-18 |
Windows 10 Mobile build 9821 is the earliest available build of Windows 10 Mobile. This build was shared on 23 December 2021.