According to the device support website, the update was originally released on May 27, and it is meant for all devices unlocked.

Surface Duo May 27 update

Here are all the improvements and fixes for the Duos in North America (version 2021.115.52):

Addresses scenarios outlined in the Android Security Bulletin – May 2020. Improves device stability and UI stability. Improves scenario when one screen would turn black while using Surface Duo in book mode. Fixes scenario when a “Double-tap to switch screens” message was appearing when in book mode. Fixes the scenario when using the TalkBack with 3-button navigation where the list of recent apps was showing on the left screen when invoked from the right screen.

The update will download and install automatically, but you can install it manually from the Android update settings page if your Duo has not received it. The Microsoft Surface Duo is a dual-screen device connected using a 360-degree hinge design that creates an 8.1-inch canvas that runs on Android 10, and you can order it now from the Microsoft Store starting at $950.

Surface Duo | See at Microsoft

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