Microsoft Delivers Another Cumulative Update to the Windows 10 Mobile Insider Preview (Updated)

UPDATE: See the two major updates to this post at the bottom. –Paul

Microsoft on Friday delivered another cumulative update for Windows Insiders using Windows 10 Mobile 1511, the first such release since mid-December. This one is for the Fast ring only, folks.

As the 63rd update to Windows Mobile 1511, this release does indeed carry the unwieldy build number of 10586.63.

And as is always the case with Windows 10 Mobile, Microsoft’s messaging on this new update was muddled right out of the gate. Insiders started seeing the update on some devices around 3:15 pm ET, but Microsoft hasn’t deign to explain the release yet.

I’ll update this post when they do. (And they have said that they will explain what’s happening.) My expectation? This build went out early by mistake, no new features.

UPDATE: Microsoft’s Gabe Aul has explained what happened via tweets. Here’s the rundown:

Sorry for confusion on the new update for Windows 10 Mobile today.

During publishing of the .63 update we detected a potential issue with staging on deployment servers.

Since we were partially staged, some people were able to detect the update.

We paused the update to investigate, and ensure that everything was 100% ready.

We’re now resuming the update and it will roll out to Windows Insiders in the Fast ring today.

UPDATE 2: Thanks to an unnamed Microsoft employee, who supplied the following list on Reddit, we now have more information about the changes in this build:

Other than the general reliability, battery and performance improvements that come with each of these revisions, there are also a few things that you’ve reached out to me about that should be improved:

• Typing on Polish keyboard in Outlook Mail
• Turn by turn directions over Bluetooth in car
• Battery usage with Iris Reco
• Reliability of quick actions settings page
• MS Band use with Cortana

By the way, reports about Windows Hello being “faster” are wishful thinking. It is just as slow as before. –Paul