Microsoft today released Windows 10 Insider Preview Build 18356 (19H1) to Windows Insiders in the Fast ring.

The biggest new feature is support for screen mirroring via the Your Phone app. Insiders can now mirror their Android phone’s screen directly on your PC without having to dig for your phone.

The new phone screen feature gives you easy access to your phone apps on your PC.  The feature will gradually roll out to Insiders on 19H1 builds. It may take a few days for this feature to show up inside the Your Phone app (version 1.0.20701.0 and above).

You can use the Your Phone app on any Windows 10 PC running Windows builds 1803 (RS4) or newer and any Android phone running Android version 7.0 or newer. The new phone screen feature is initially only compatible with a limited set of devices. Surface Go will be the first device in the Surface lineup to preview this feature. Microsoft will continue to expand the list of devices over time for both the PC and phone.

Phone screen requirements:

• Select Android phones* running Android 7.0 or greater (*Samsung Galaxy S8/S8+/S9/S9+).
• Windows 10 PC with a Bluetooth radio that supports low energy peripheral role. How to check if your PC supports this.
• Latest 19H1 preview build (18335+ recommended).
• Android phone must be on, within Bluetooth range of the PC, and connected to the same network as the PC.

Known issues:

• Touch input doesn’t work yet
• Always on display will not be shown on the phone screen displayed on the PC
• Blue light preferences will not be applied on the phone screen displayed on the PC
• Audio will play out of the phone speakers, not the PC
• Double clicking may bring down notification center
• Some games and apps do not support mouse interactions (e.g. Pokémon Go, Merge Dragons, Feedly)
• If you turn on the setting to hide soft keyboard when a physical keyboard is present your soft keyboard will disappear whenever you’re within Bluetooth range of your PC regardless of the state of the Your Phone app or phone screen session

For everyone else, the update brings the following general changes, improvements, and fixes for PC

• Microsoft fixed a Microsoft Edge crash encountered when interacting with combo boxes in PDF forms.
• Microsoft fixed an issue that could result in night light being on after an upgrade, even though all the settings showed that night light should be off.
• Microsoft fixed an issue where using the slider to adjust the night light strength could result in night light getting stuck on.
• Microsoft fixed an issue where night light was skipping the fade transition when it was turned off (manually or scheduled).
• Microsoft fixed an issue resulting in increased battery drain while the screen was on in recent builds.
• Microsoft fixed an issue resulting in the “…” menu contents being clipped for certain apps like Voice Recorder and Alarms and Clock when the app was full screen.
• Microsoft fixed an issue resulting in some Insiders experiencing bugcheck green screens citing a KERNEL_SECURITY_VIOLATION error.

Known issues

• Launching games that use anti-cheat software may trigger a bugcheck (GSOD).
• Creative X-Fi sound cards are not functioning properly. Microsoft are partnering with Creative to resolve this issue.
• Some Realtek SD card readers are not functioning properly. Microsoft are investigating the issue.
• Microsoft is investigating an issue preventing VMware from being able to install or update Windows Insider Preview builds. Hyper-V is a viable alternative if available to you.

Known issues for Developers

• If you install any of the recent builds from the Fast ring and switch to the Slow ring, optional content such as enabling developer mode will fail. You will have to remain in the Fast ring to add/install/enable optional content. This is because optional content will only install on builds approved for specific rings.

Windows 10 Insiders in the Fast Ring can download the update by Checking for Updates in Settings.