Microsoft just released the latest Windows 10 Mobile Build, dropping the new firmware as an Insider beta preview.

Windows-powered smartphones hold a meager share of the smartphone market despite Microsoft's best efforts to turn the tide, but the company is keen on improving things and releasing new updates to Insiders so it can perfect its mobile software.

Build 10586.29 is a "Cumulative Update" for previous build 10586 and adds a few tweaks and changes to make things smoother for Windows 10 Mobile users. Microsoft dropped the update late on Friday, Dec. 4, taking many by surprise.

Microsoft noted that it received valuable feedback from Insiders on the 10586 Windows 10 Mobile Insider Preview build and the latest build now starts to address some of that feedback.

"While this is the same base build that we are shipping with new Windows 10 devices, we are continuing to address feedback on the upgrade experience from Windows Phone 8.1 as reported from Windows Insiders," Microsoft explained.

"Today we are releasing our first Cumulative Update to the Windows 10 Mobile Insider Preview Build 10586 to Insiders that begins addressing this feedback," the company wrote in its Dec. 4 blog post.

When it comes to changes, build 10586.29 brings some improvements that aim to enhance the performance of the new Microsoft Edge browser. If you already have Windows 10 on your desktop, you probably already tried the new Edge browsing experience.

The latest Windows 10 Mobile build for Insiders also brings forth a new set of code that aims to facilitate the way people upgrade their smartphones. The code includes improved application backward compatibility for Silverlight applications in Windows Phone 8.1, Microsoft pointed out.

The new build is not the largest update in terms of new capabilities, but it should nonetheless polish more rough edges and get the update closer to a public release.

Microsoft also noted that its Lumia 950 and Lumia 950 XL Windows 10 smartphones will be added to the Windows Insider Program within a few days, which means they will soon get the latest code. The Microsoft Lumia 550 and the LG Lancet will join the party early next week as well, becoming available for Windows Insiders.

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