Today Microsoft has released yet another preview build of Windows 10 Mobile for its group of Windows Insiders. The new version offers a first glimpse at the Windows Store. And because that's now included, you can also download Microsoft's universal Office apps onto Windows Phone devices for the first time. Microsoft said they'd be coming this month, and Word, Excel, PowerPoint, and OneNote are all available to install right away.

The other big addition here is the Xbox app. It's been available in Windows 10's desktop preview for some time, but starting today Windows Phone beta testers can access "activity feed, achievements, friends list, activity alerts, messages, watch Game DVR clips, and connect to Xbox One." New preview apps for Music (which plays tracks stored on OneDrive) and Video are also included.

Another good thing about this update is that you can finally install it on some of the better Windows smartphones out there, including the Lumia Icon (930), Lumia 640 / 640XL, and HTC's One (M8) for Windows, which is the first non-Lumia device to join the preview program. Microsoft notes that Windows 10 Mobile's new camera app doesn't yet take advantage of the advanced features some Lumias offer, so you'll still want to download the dedicated Lumia Camera app if you rely on some of that functionality. Eventually, Microsoft says all existing Lumia Camera features will make their way to the new default camera that's built into Windows 10 Mobile.

Since this is still a fairly early preview, plenty of known issues remain — including one nasty bug that could prevent select users from receiving MMS messages. For the full list of what's new, head over to Microsoft's blog post.