Windows 10 Mobile build 10166 available now on the Fast ring with improvements to the core quality

Microsoft pushes Windows 10 Mobile build 10166 to the Fast ring of updates with many tweaks and stability improvements.

Windows 10 Mobile build 10149

Windows 10 Mobile build 10166 rolls out through the Fast ring of updates, Microsoft makes the announcement only a day after releasing Windows 10 build 10166 also to the Fast ring of updates, but for PCs. What’s interesting about is that today both versions of the operating system have the same build number.

The software maker points out that the new release brings a number of “small changes and feature tweaks”, and like in previous builds the major focus is on adding “improvements to the core quality”.

The major focus for Windows 10 Mobile build 10166 is improvements to the core qualityTweet Quote

According to the company, the majority of the known issue found on build 10149 have been fixed. In addition, the company confirms that it has fixed the “post-upgrade migration status screen was missing, which made the Lock screen appear frozen without the date and time for up to 10 minutes.” After upgrading to Windows 10 Mobile build 10166, everything should work as expected.

The company continues saying that has also fixed the issue where users were having trouble unlocking their phones after entering a PIN.

Furthermore, colors in apps should render correctly, and build 10166 improves reliability of app download and updates from the Store, which no longer shows as “beta”. Another visual change includes a new and bigger battery icon, which should make it easier for everyone to see.

Finally, the company says that there are a few updated apps waiting to be downloaded from the Store.

Remember that you need to have the Windows Insider app installed and configured to receive new updates via the Fast ring, then simply go to Settings> Update & Security > Phone update to check for build 10166.

Source Microsoft

About the author

Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and