Windows 10 Mobile build 15205 bugs: install fails, Edge freezes, and more

By: Madeleine Dean
2 minute read

Microsoft recently rolled out a new Windows 10 Mobile Redstone 3 build to Fast Ring Insiders. Build 15205 fixes eight annoying issues affecting the OS, but doesn’t bring any new features to the table.

As expected, this release also brings issue of its own, as Insiders report. In this article, we’re going to list the most common Windows 10 Redstone 3 build 15205 bugs reported by users.

As a quick reminder, the Insiders Programs currently supports only 13 phone models. You can still install Redstone 3 builds on unsupported phones, but it’s likely that you encounter various technical issues. If your device is not on the list of phones supported by the Windows 10 Mobile Redstone 3 OS, the best solution is to simply opt out of the Insiders Program.

Windows 10 Mobile build 15205 reported issues

Build 15205 won’t install

Some Insiders can’t install build 15205 due to various install errors. Now, if you’re getting the following error message, “Some update files aren’t signed correctly Error code: 0x800b0109”, go to the Windows Insider app settings and check if there is a prompt to restart the phone.

If this is the case, simply restart your phone and build 15205 should then install without any problem.

Phone crashes when voice control is activated

This issue seems prevalent for Lumia 950 XL phones. When users activate the mic to use Cortana, the phone immediately crashes. If you’ve encountered this issue, try restarting or resetting your phone. If this doesn’t work, use the Windows Device Recovery Tool.

Download the Windows Device Recovery Tool on your PC from Microsoft’s support page. Bear in mind that this software will install the latest version of Windows approved for your phone and remove all apps, games, texts, call history, music, and photos.

Edge freezes

Microsoft still needs to optimize Edge for the Windows 10 Mobile Redstone 3 OS. Insiders have reported that the first Edge page displays very tiny letters, and freezes when they want to open it again.

Charging issues

Other Insiders have experienced charging issues. More specifically, the battery appears to be charging, but when users disconnect the charger, the battery is still empty. The good news is that this is a rather rare issue.

These are the most frequent Windows 10 Mobile build 15205 bugs. If you’ve encountered other issues, use the Feedback Hub to provided Microsoft’s engineers with more details about the problems that you’ve encountered.


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