Windows 10 Mobile Build 10586.164 Released, Switch Rings to Get it

Wondering why you don’t see the Windows 10 Mobile Build 10586.164? If you’re in the Fast Ring, you need to switch to Slow or Release Preview ring to get it.

As we reported, Microsoft today released the new Cumulative Update KB3140768 for PCs that brings your computer to build 10586.164. The same build was released for Windows 10 Mobile today, too. Here’s a look at how to get it, and what improvements you can expect in this new build.

However, if you’re a Windows Mobile Insider with a phone other than a retail Windows 10 device, i.e. Lumia 950, 950 XL, or 550 and in the Fast ring, you won’t see it. You’ll need to take a couple of steps to get it.

Get Windows 10 Mobile Build 10586.164 on a Non-Retail Phone

In this example, I have a Lumia 640 and participating in the Windows Insider Program’s Fast ring.

Launch the Windows Insider app and switch to the Slow or Release Preview ring and get the update. After that, go back into the Windows Insider app and switch back to the Fast ring.

Windows 10 Mobile

To confuse things a bit more, if you are using a Lumia 950, 950 XL, or Lumia 550 and running the Redstone preview – this update doesn’t apply to you at all.

Still not sure what’s going on? Well, to help you out, Microsoft explains what’s happening on this Q&A page.

Key improvements in Windows 10 Mobile Build 10586.164

Here’s a look at what’s new in this build according to Microsoft:

  • Improvements for the reliability of app notifications, including text messages and alarms not ringing as scheduled.
  • Improvements for text message backup to reduce data and battery usage.
  • Fixes for Microsoft Edge with address bar suggestions showing late or persisting during navigation, “Close all tabs” not closing all tabs, and Word Flow on the address bar not functioning as expected.
  • Fix for a problem where the Microsoft account was not detected by the Outlook Mail, Outlook Calendar and People app. Attempting to add a new contact in this state caused the People app to crash for some users.
  • Fix for a problem that caused the Wi-Fi connection to temporarily switch off after prolonged use for some users.
  • Fix for a problem that caused first-party app updates to fail to install successfully for some users, leaving the apps in state where they cannot be launched.
  • Improvements for battery usage, Bluetooth connectivity, and OS reliability.

After you get this update, let us know how things are working for you. Or for more in-depth conversations, head to our new and improved Windows 10 Forums.



  1. Jeremy Dvorak

    March 8, 2016 at 10:12 pm

    Getting the update on my Lumia 640 right now. Hope it works better than the last build!

  2. JH

    March 9, 2016 at 10:54 am

    I installed last night on my 640. No change from last build, data still does not work. I get phone and texts fine. But I can only get on internet/email on wifi. And yes I checked that all data and cell is ‘on’ and configured correctly. Damn you Microsoft…. Damn you to hell.

  3. mihai muraru

    March 15, 2016 at 11:24 am

    I don’t think that WM10 will be as fast as WP 8.1 on Lumia 640 LTE.

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