For those of you in the Windows Phone 8.1 Developer Preview program, Microsoft is rolling out a mandatory update right now. This update bumps the build number to 8.10.14192.280.

Here’s what Microsoft had to say about it: “This update contains our usual scope of fixes and improvements. We’re requiring this update so we can continue to test our update systems. The update will show as a “critical update” on your phone.”

This update is mandatory and will bring you to the latest build offered for the Windows Phone Preview for Developers program. If you ignore the update, it will automatically install 72 hours after it has been downloaded, or you can install it right away.

For those of you who do not want this update (we’re not sure why you wouldn’t), just open the Preview for Developers app on your Windows Phone device and uncheck “Enable Preview for Developers.”

No change log for this update has been provided, so download it and let us know what new improvements you notice.

Update: Microsoft has just confirmed that this update is ‘testing critical update capability’ and the update itself does not contain any critical fixes. See tweet below.

WP developer preview “critical update” is testing critical update capability. Payload is not actually “critical”. — Greg Sullivan (@gregwardo) October 23, 2014

Thanks for all the tips guys!

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