Microsoft today pushed Windows 10 Mobile Build 15254.490 (10.0.15254.490) as the cumulative update KB4341235 to those on Fall Creators update aka Windows 10 Mobile Version 1709. The changelog for the Build 15254.490 mentions only fixes and security updates. Read the full changelog below.

You can check the update availability by going to Settings–>Update & Security–>Windows update–>Check for updates.

Windows 10 mobile Build 15254.490 Changelog:

This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • This build includes all the improvements from KB4338826.

If you installed earlier updates, only the new fixes in this package will be downloaded and installed on your device.

For more information about the resolved security vulnerabilities, see the Security Update Guide.

KB4338826 Improvements and fixes:


This update includes quality improvements. No new operating system features are being introduced in this update. Key changes include:

  • Addresses an issue with form submission in Internet Explorer.
  • Updates Internet Explorer’s Inspect Element feature to conform to the policy that disables the launch of Developer Tools.
  • Addresses an issue that, in some cases, causes the wrong IME mode to be chosen on an IME-active element.
  • Addresses an issue in which DNS requests disregard proxy configurations in Internet Explorer and Microsoft Edge.
  • Addresses additional issues with updated time zone information.
  • Evaluates the Windows ecosystem to help ensure application and device compatibility for all updates to Windows.
  • Security updates to Internet Explorer, Microsoft Edge, Windows apps, Windows graphics, Windows virtualization, Windows kernel, and Windows Server.

If you installed earlier updates, only the new fixes in this package will be downloaded and installed on your device.

For more information about the resolved security vulnerabilities, see the Security Update Guide.