Specifically, it supports the Lumia 930/Lumia Icon, Lumia 640 and 640XL, and our first non-Lumia phone – the HTC One (M8) for Windows.

However, some bugs will affect users experience and they should make sure to read the known issues below before installing.

Windows Store Beta for phones: This build brings a first look at the new Windows Store in Windows 10 for phones. Users will see it designated as Store (Beta). The Store Beta has a new visual design and if you’ve been using the Store Beta on PC, it should feel familiar since it’s the built using the new Universal Windows Platform code.

Universal Office apps: Now that the Store Beta is included in this build, you can download the Word, Excel, PowerPoint and OneNote Preview apps.

Xbox app:
The Xbox app for Windows 10 is also now available for phones in the Store Beta (version 4.4.230). With the Xbox app on your phone – you can access your activity feed, achievements, friends list, activity alerts, messages, watch Game DVR clips, and connect to your Xbox One.

Music Preview app: Access your music collection and play all your music – including songs you have added to OneDrive. The new experience for Now Playing makes it easy to swipe between songs and it looks great.

Video Preview app: Browse and play video files (including MKV files!) on your device. Try out filtering and sorting your collection and adding a folder of videos to include in your collection. You can also browse and play movies and TV shows you’ve purchased and rented from Xbox Video.

Check out the new Camera app:
We want your feedback on the new Camera app for Windows 10! Make the Camera app your default camera app by going to Settings > System > Photos & Camera (or pin it to your Start screen) and let us know what you think. Note that high-end Lumia devices (1520, 1020, 930, 830, 640, and 640XL) have some features not supported by the new Camera app.

A few fixes: Microsoft has fixed a few things in this build. Tapping on an e-mail notification now launches you into that e-mail message instead of the calendar. Incoming calls should play a ringing sound now.

READ MORE: Microsoft to rename its Windows Phone as Windows 10 Mobile