Windows Phone 7.8 build 8835
| Build of Windows Phone 7 | |
 | |
| OS family | Windows CE |
|---|---|
| Version number | 7.10 |
| Build number | 8835 |
| Build revision | 35 |
| Architecture | ARM32 |
| About dialog | |
Windows Phone 7.8 build 8835 is the earliest known and available build of Windows Phone 7.8. Two photos of it running on a Nokia Lumia 710, along with alleged ROM files for various smartphones were uploaded to XDA, however the download links have since been lost.[1] This build's ROM for the HTC 7 Mozart smartphone was later rediscovered and shared on 4 March 2025.