Windows 10 build 18356 hits the Fast ring with phone mirroring in tow

It's a new week, which means another new Windows Insider build is on its way to the Fast ring. Today, Fast ring Insiders can get their hands on Windows 10 build 18356, which brings along a variety of general bug fixes and improvements.

The real highlight here, however, is hte arrival of what Microsoft has dubbed "phone screen" in the Your Phone app for Insiders. This is the Android screen mirroring feature that Microsoft teased at its October Surface event in 2018, and we saw hints of earlier today. The feature only works with Surface Go PCs and a select group of Samsung phones from the Galaxy S8 and S9 lines at the moment, but it will allow you to interact with your phone right from the Your Phone app on your PC.

Here's the full rundown of build 18356.

What's new

Take your phone's screen to the big screen: We are excited to provide an early preview into the newest feature for the Your Phone app – phone screen. You can now mirror your 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. Whether scheduling a ride to the airport or checking your social updates, do it with ease from the comfort of your PC without having to take your phone out of your bag or go back and forth between devices. Go ahead, give your thumbs a break, and get things done faster with your keyboard and mouse.This 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).

General changes, improvements, and fixes for PC

  • We fixed a Microsoft Edge crash encountered when interacting with combo boxes in PDF forms. We 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.
  • We fixed an issue where using the slider to adjust the night light strength could result in night light getting stuck on.
  • We fixed an issue where night light was skipping the fade transition when it was turned off (manually or scheduled).
  • We fixed an issue resulting in increased battery drain while the screen was on in recent builds.
  • We 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.
  • We 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. We are partnering with Creative to resolve this issue.
  • Some Realtek SD card readers are not functioning properly. We are investigating the issue.
  • We're 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.
  • 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.

As always, you can get the full details of the latest Fast ring build at the Windows Blog, including all of the particulars for getting set up with the phone screen feature in the Your Phone app. Otherwise, Fast ring Insiders can grab build 18356 via Windows Update now.

Dan Thorp-Lancaster is the former Editor-in-Chief of Windows Central. He began working with Windows Central, Android Central, and iMore as a news writer in 2014 and is obsessed with tech of all sorts. You can follow Dan on Twitter @DthorpL and Instagram @heyitsdtl

  • I guess this would explain why they haven't made any significant updates to the "Your Phone" app, which sucks compared to Dell's option, which does all of this. Hopefully, MS will catchup and surpass, but I would be happy if it was just on par.
  • The weirdest thing is that Dell Mobile Connect does not work on my Dell G5 laptop...
  • But it does work on my (non-Dell) desktop PC and Samsung phone.
  • I also have a Dell Alienware R3 laptop but from what I have been reading on their support pages, only laptops and desktops manufactured after 2017 will work. Mine is a 2015 model so it doesn't work 😢
  • It's working on my 2013 XPS 2720 AIO and my XR....
  • When first glancing at the title I saw the word "phone" and got way too excited. Your Phone improvements are dope too though, wonder if it works with VPNs yet
  • What do you mean with VPNs?
  • When I tested it, if a device (phone or computer) was connected to VPN, the two devices would not find each other. Not sure why, as they know what my Microsoft account is. Perhaps using a port that is deactivated or blocked over VPN? I can't seem to use the app right now on my school network, even on my own router, so assuming something is blocked there as well.
  • still doesn't work with VPNs so I have given up on using Your Phone and instead I am currently using "Messages App (no ads)" app found on the Microsoft Store. It costs like 3.5 Euros but worth it (essentially a web wrapper for Android messages but works all the time even with VPN and data connection)
  • Hopefully 19H1 will have this avaliable to all phones and Windows 10 computers
  • But it does work on my (non-Dell) desktop PC and Samsung phone.
  • No watermark or expiry date with this build, so probably only 2-3 builds away from final version
  • First fix the Your Phone app to work with most Android phones. I have tried it on Huawei P20 Pro, OnePlus 6, and LG G6 and all three have issues connecting and sync. The first time it will work but after that it gives problems that it's pointless to use.
    Oh and also allow Your Phone to work when using a VPN service too
  • I think this is that type of feature which will excite everyone, but only few people will end up using it after few months.
    But, anyway it is nice thing to have and will help a lot when someone really need it.
  • This feature is fun but apk support in windows natively would be best. Bluestacks is an ok bridge but native support for android apps would make windows os a no brainer for so many users.
  • MS should buy Dell Connect and rebrand it as Your Phone and saves themselves the nowhere developing time....easy peasy!
  • My phone does not mirror my phone as stated. Pictures and texts work though. Is it rolling out slowly or do I need to relearn my phone?