Last month, Microsoft had revealed that it has teamed up with Chinese smartphone maker Xiaomi, and will be allowing a selected group of Mi 4 users to run Windows 10 on their handset.  Since then, the company has not revealed much about the program. Today though, a video of the Mi 4 running Windows 10 has surfaced on the Internet, which gives us the first glimpse of how Microsoft’s refresh of Windows Phone looks. For a ROM that is running on an Android device, Windows 10 looks pretty smooth on the Mi 4. Don’t get excited about Microsoft bringing its Windows 10 ROM for others Android devices though, because it is unlikely that the company will take so much effort to port Windows 10 for various Android devices out there.