Surface Duo's April 2021 Android security and firmware update is here (Update: Changelog)

Surface Duo March2021 Update
Surface Duo March2021 Update (Image credit: Daniel Rubino / Windows Central)

What you need to know

  • Microsoft's Surface Duo is receiving its April 2021 update.
  • The update is 338MB and brings the build number to 2021.314.91.
  • The Surface Duo changelog hasn't been updated yet.

Update 4/22: The changelog is now live and reposted below.

Microsoft's Surface Duo is in the process of receiving its April 2020 update.

The update will likely contain an assortment of improvements, one of which will be an Android security patch. Given that April's update is 338MB in size, which is far bigger than previous months, there might be a number of noteworthy changes included.

This patch brings the build number from 2021.207.70 to 2021.314.91, with the security patch now being April 20, 2021.

Changes for the April 22 Surface Duo update:

  • Addresses scenarios outlined in the Android Security Bulletin - April 2020.
  • Improves device stability and UI stability.
  • Improves device performance when opening and closing apps, accessing your recent apps, or swiping up to see all your apps.
  • Fixes the scenario where the wallpaper was not appearing after unlocking Surface Duo.
  • Fixes the scenario where a notification badge appears on top of a running app and causes the screen to turn black.

To grab the update yourself, use these steps:

  1. Connect to a Wi-Fi network.
  2. Select Settings on your Surface Duo's home screen.
  3. Select System.
  4. Select System Update.
  5. Select Check for update.
  6. Select Restart now.

As usual, those with AT&T-branded Surface Duos will likely have to wait a week for carrier approval.

Robert Carnevale

Robert Carnevale is the News Editor for Windows Central. He's a big fan of Kinect (it lives on in his heart), Sonic the Hedgehog, and the legendary intersection of those two titans, Sonic Free Riders. He is the author of Cold War 2395. Have a useful tip? Send it to