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Windows 10 Mobile build 15031 for Fast Ring released to Insiders

Just a few days behind the PC version of build 15031 for the Fast Ring comes the Windows 10 Mobile version. However, while the OS release for PC brought many new and exciting features the Mobile one is a bit less interesting.

The full changelog, reposted below, focuses mostly on the new Share icon. That's not to say a lot of bugs have not been fixed and likely even more under the hood improvements, but this is an update you can likely wait for until you get home for work. Here is what's new and improved.

Windows 10 Mobile build 15031

What's new

  • New Share icon: We're introducing a new share icon. For apps that used the "share" font glyph in Segoe MDL2 assets should get the change automatically. You can read more about the change here.

Other changes, improvements, and fixes for Mobile

  • We fixed an issue in recent Insider builds where certain calendar appointments could result in a Mail crash with every sync. This issue could also result in issues sending and receiving SMS.
  • We fixed an issue where pausing a streaming track, for example in Groove Music, would result in no more re-buffering when playback is resumed, leading to choppy playback audio.
  • We fixed an issue where text copied from a PDF in Microsoft Edge couldn't be pasted.
  • We fixed an issue where the ninja cats on the People and Animals page of the keyboard were displaying in two characters on the keyboard instead of the expected one.
  • We also added the rainbow flag emoji to the keyboard. You can find it in the transportation and weather section.
  • We've updated Keyboard Settings so that "Switch back to letters after I type an emoticon" is now off by default.
  • We fixed an issue where Microsoft Edge might sometimes unexpectedly not rotate into landscape mode.
  • We fixed an issue where, if the phone was connected to the PC, deleting an entire folder (without opening the folder) on the phone from the PC's file explorer might not result in the folder actually being deleted on the phone. We also fixed an issue where (still connected to the PC) the phone might freeze for a short while after cancelling copying content to the SD card.
  • We fixed an issue resulting in some games with an explicit option to "exit game" unexpectedly taking a long time to close.
  • We fixed an issue resulting in some games were drawing up and to the left offscreen in recent flights.
  • We fixed an issue where receiving a notification while the phone was in your pocket could unexpectedly result in the screen turning on.
  • We've improved reliability when handling malformed Gifs in XAML-based apps.

Known issues for Mobile

  • Speech packs will be unable to download on this build.
  • Adding a new card / paying with an existing card will not work in Microsoft Wallet.
  • Going to Settings > Devices will crash the Settings app. You will be unable to pair a Bluetooth device. Bluetooth quick actions from Action Center also does not work. Continuum will also not work.

Grab the update now and let us know what you think.

Daniel Rubino
Executive Editor

Daniel Rubino is the Executive Editor of Windows Central, head reviewer, podcast co-host, and analyst. He has been covering Microsoft here since 2007, back when this site was called WMExperts (and later Windows Phone Central). His interests include Windows, Microsoft Surface, laptops, next-gen computing, and arguing with people on the internet.

298 Comments
  • So no picture in picture mode wtf
  • you got a new SHARE ICON
  • Oohhh....wow 😒
  • Isn't it awesome!? Much needed! This is the height of mobile development!
  • Lol. I have the share icon even without downloading the build.
  • They a/b tested it.
  • It on more app like Windows central on this build
  • Share icon looks like ****. Not sure what they were thinking
  • And a RAINBOW FLAG. I'm not an emoji person, is there a Stars 'n Bars?
  • Looks like no national flags are here, but along with the rainbow flag 🏳‍🌈 they do have other American symbols 🗽
  • Stars and bars, c'mon, seriously?
  • And sharing is caring!!
  • Y for the rainbow flag. No fish supported around here.
  • Desecrating the covenant between God and mankind. No worries about potentially offending billions, apparently.
  • We have ✝ , that's it
  • I think I'll wait for the next build before I switch to fast ring
  • Last build did get much better for me, so it is improving. It's a much faster experience than Production.
  • The Bluetooth bug is a big problem for me. I use a 60gb lte plan as my main internet connection. And Bluetooth allows me turn on hotspot from my laptop.
  • What happens to the devices that are already paired?
  • I have no idea so I'm not taking the risk
  • Nothing changes. You just can't pair anything new.
  • That's not entirely true. It means that the regurlar toggle off and on when any device you want to connect to fails, which is any of them, will mean now it will require a restart.
  • Yes this seems to be the case . Initially I found I could pair through NFC to my speakers but since realized my phone has paired to my Fitbit Surge and another windows phone and Pc
  • The Bluetooth is the only way we share data easily on windows, not as if we have a working xander app or something
  • Try ShareIt. It is really cross platform and lot easier than Xender.
  • Bluetooth works if you can pair by means of NFC. I have paired bluetooth speaker and my other windows phone by doing this
  • Bluetooth works everything that had already been paired has automatically paired again.
  • Thanks for letting us know. By chance is it the same on the desktop build? I can't imagine that surface devices with pen's would just be left stranded.
  • Why don't you WiFi share?
  • it is wifi hotspot that i'm using, but you can enable an option to turn on wifi hotspot via bluetooth
  • Ok, switching to fast now, Daniel, consider yourself responsible
  • You are making me switch to fast from release ring
  • If mine would just download, and not just keep re downloading and giving annoying error codes
  • Mine did that twice. I rebooted and it was fine
  • No Bluetooth and no continuum is a small price to pay for a new share icon! Downloading now!!!
  • Lol
  • Seems their engineering department consists of 8 years old kids. Unbelievable what bugs they regularly produce. And it never ends. W10M is rightfully dead. 
  • What?! That's so disrespectful! I know plenty of kids 8 & younger who can make share icons much more visually appealing!!!!
  • I downloaded it without looking at changelog but man I hardly use Continuum but use my bluetooth quick actions religiously.  I hope they fix the wallet soon that is the real reason I blindly updated.
  • Unable to pair a Bluetooth device? I think ill wait this one out if I cant use my Pebble Steel its great for reading notifications on the go without having to go to my L650 every time while at work
  • You can't pair anything new. Already paired devices work like they always do.
  • My band won't sync after update
  • So wanted to update to this as the 'not rotating into landscape mode in Edge' is really annoying me now and it's fixed in the latest update but I simply cannot afford to lose Bluetooth functionality if I do. Already had to roll back on my Surface Pro 2 because of the Bluetooth Bug
  • Bluetooth is accessible on PC, from the old control panel; devices and printers. Unfortunately mobile has no control panel.
  • Yea, but, the PC Bluetooth settings page crashes and I can't setup a new pair. Now mobile will break? No thanks.
  • thanks for the tip as the new device wizard didn't find my phone :)
  • Already paired devices are ok new pairs is where it takes a dive
    But i agree with you there is nothing special in this one
  • Continuum will not work?
  • You read that!
  • That makes this update a deal breaker for me. I'll wait for the next time. I'm already bummed that tap-to-pay no longer works, and I'd love for Edge to reliably rotate, but no continuum means no install for me.
  • I have Lumia 950 and continuum works for me.
  • They updated the notes. Continuum will work with a dock, but not wirelessly.
  • Looks like no night light for mobile for the creators update.
  • exactly, a shame. Not like this would have made sense on a mobile device. I was really happy with W10M and my L950 and especially looking forward to this (on my work iphone night shift is great) but now it starts to feel a bit like WinRT
  • "Wait for the right time" says Microsoft ;)
  • Well hello there, error 0x8008008, come here often? *grinch*
  • Soft reset fixed this for me
  • Check for updates soon after a reboot 😁
  • A lot of new features ☺ . Thanks Microsoft
  • Dark sarcasm...
  • Slow ring hasn't gotten an update since nov. What the hell?
  • Trust me, you aren't missing much.
  • Lol
  • You know what, stay where you are, on the fast lane its not as good as pc.
  • Spent more days for mobile but just a new icon???
  • Those days are to remove the features added to the PC ;) Because Microsoft is waiting for a right time :)
  • So any of the major upvoted feedback problems been fixed, like email accounts vanishing frim mail. Edge fixed though.
  • I wanted to tweet you a new Share icon few days ago I noticed in Photos app, I'm on release ring.
  • Same here
  • Why bother
  • Ninja🐱 fix - lol!
  • Glad the File Explorer and the emoji issues were fixed. Here's hoping the keyboard is more responsive as well. It's been lagging on many of my apps since last week when I upgraded from 14393. Already had the new Share icon as well, but bugfixes are always welcome! :-)
  • Wow, not one Windows Phone is dead comment. Must be a slow night.
  • I wanted to make one, but I decided not to. Didn't want to take the downvotes. I'm really upset about the missing night light feature on mobile. I feel like the OS is always behind when comapred to PC. Then, when we finally get a build, it sucks and isn't worth it.
  • A lot of the new features for PC, folders on start menu for example, are already existing on mobile. So it seems like we're not getting much.
  • Would it kill them to allow Mobile to see network files and PC's
  • I have given this feedback until i gave up. It would be the coolest thing ever if that happened, atleast for me
  • Remember, for mobile they focus on new business-features only, like new share icon ...
  • Also disabling wireless continuum ;)
  • Continuum its cancelled for this build.
    What does it tell you...zzzzz boom... Dead.
  • There is a difference between "broken" and "cancelled". Nice try though.
  • Thank God, that last build wasn't just broken, it was shattered.
  • Nice playing down what's broken folks.  One bullet says - Settings app crashes.  Cant Pair Bluetooth.  Bluetooth quick action broke.  Continuum Broke.  Holy Cow! They shouldnt have released this and I'm glad I switched my device to the Slow ring before it came down.
  • ¯\_(ツ)_/¯
  • Had to remove apps (that won't install on sd card) as install to big, thought they had fixed this with only updating what it needs. Edge address bar still not fixed. Already had a random reboot. Keyboard seems sluggish still. Can't pair Bluetooth. They really need to clear off old files from system drive. I'll update a bit more later.
  • *We fixed an issue where Microsoft Edge might sometimes unexpectedly not rotate into landscape mode.
    *We fixed an issue resulting in some games with an explicit option to "exit game" unexpectedly taking a long time to close. I experienced these two issues. Glad to read these and other issues are resolved.
  • """Going to Settings > Devices will crash the Settings app. You will be unable to pair a Bluetooth device. Bluetooth quick actions from Action Center also does not work. Continuum will also not work""" Hahaha, just pull the update.
    Should never have been released.
  • Skipping ... the last Fast Ring is stable and I like Bluetooth. Good on the new share icon though
  • Can you connect Netflix to a big screen now that continuum doesn't work?
  • You can do that when Continuum works. Just choose to mirror screen instead. I think it's under system/display in settings (when you are connected to a display). Do a bing search otherwise and you will find it.
  • bluetooth issues and no continuum, I will pass. I use Continuum daily at work to show it off using my Elite X3.
  • They updated the notes. Continuum works with a dock, just not wirelessly in this build.
  • Chrome is still flaky with this build :-(. It's been broken for two builds in a row. It's weird that FF is unaffected though. Oh well.
  • You can't even install those apps on mobile... What are you talking about?
  • Can someone clarify or confirm about the last known issues on the bluetooth and settings? What exactly isn't working??
  • As it says you can't access the bluetooth settings to pair. Anything previously paired will still work.
  • Kinda wish i skipped this one, after the download started haha bt issues and no continuum.
  • I know that this is Fast Ring but this build have major problems, it shouldn't have been released.
  • Hence why it's called Fast ring :-) as we get close to public release we get more raw builds so we can help squashing the last-minute bugs
  • These are not last minute bugs, but rather a deeply flawed software. And they don't need our help, because the bugs are mentioned in the change log.
  • Once again, this is the Fast ring. Bugs ARE supposed to happen. It's in the terms of the WIP. If you want a bug-free experience stay away from Preview builds, specially Fast ring builds.
  • First time since WP8; I'm skipping a build. 😪
  • I was about to do the same but it already downloaded... Never skipped a build
  • Skipped the last 3 and I use my phone for work and I can't be having more problems. So after my battery fix in staying on release preview build.
  • So no fix for random freezes on 950xl?
  • You wish
  • Mine was doing that and it was the battery. The battery was replaced and the old battery now has a bulge in the center like its going to pop.
  • I don't face random resets on Lumia 950 XL but... I used to ! It didn't happened after I change the battery. It may be a faulty battery, think about it 😉
  • Had the same problem, thought it wad the build but turns out it wad the battery. Had the 950 since it first came out and since there was no replacement battery to get through att, they just sent me a whole new unit. So if it's over a year on the battery and experiencing frequent reboots, it could possibly be the battery.
  • So yet again we go one step forward and two steps or more backward!
    Why release something that doesn't work when it did?
  • Wow thats a really long list of new stuff.
  • Bluetooth voice hasn't worked with the last few builds for me. Connected devices show connected to voice and music but the phone rings during a call instead of the connected device, which has always caused the caller's voice to not be heard on either device.
  • I am confusing. I have the new share icon for a while now, before this build.
  • They had to write something
  • They a/b tested it prior to this build. Now everyone gets it.
  • If a/b test why none of top upvoted items been addressed.
  • Edge still has not been fixed. Outlook randomly links accounts, fails to sync or loses account completely.
  • I agree
  • Gonna avoid this build because of the Bluetooth issues.... I cannot risk it since I depend on Bluetooth on so many devices
  • This is the 2nd straight fast ring build that is not showing up for me.  Any suggestions on how to force the upgrade?  I have seen suggestions to hard reset.  Is that the only route?  I need a fix so I can get my upgrade "fix".
  • this happened to me a few builds back, i got it to work by switching to slow ring, hit the check for updates button, then after it finishes that switch back to fast ring and check again.
  • Thanks - I tried that multiple times with 15025 without success but will try again on this build.  Don't want to do a hard reset or I will lose my already paired BT devices.
  • For those wondering; Bluetooth is working well. You won't be able to pair NEW devices but previously paired ones should work fine as i'm currently using my BT headphones without a hitch.
  • What device are yo using? Sound quality has been terrible on my L950 since the 007 build. Did you experience any problems in the past that this build fixed? I'm still waiting to install.
  • Just updated my Lumia 735 to build 15031 and now its worse then before. Getting frustrated with Microsoft with pushing updates that suck then the previous build. Edge for me works in landscape and sometimes doesn't. Alot more UI glitches then I had before
  • Hmm its called fast ring for a reason you know 😶
  • Anyone using the Idol 4s on Fast Ring?
  • We all now know they are not gonna do anything special for Mobile because it is FEATURE COMPLETE. So at least the best they can do is make the OS just WORK for us. I want it to be stable without any automatic brightness reduction, phone freezing (L650, L950XL on 14393.693), screen going black after or before taking a call, photos app not taking 40-50 seconds before my shots show up. Thank you MSFT. You are awesome.
  • That's why even doe I may like Microsoft I just bought me a Samsung S7 Edge. Can't deal with an unreliable Lumia 950XL that gets hot, lags, black screen, random restarts, photos not saving to spite being on main memory, limited apps & the biggest problem I have is Microsoft not acknowledging my emails and making sure IOS and Android apps are better than there own.
  • Screen going black after the phone call. I have the same issue. Lumia 950.
  • I got rid of my 950 for similar reasons, and I don't regret it. It seams for as much progress they make forward ( MS ) it still feels like their still behind other OS's. I still use my 650 and my 1520 is really dead weight after this update.
  • Downloading... 72%
  • Failed to install due to some error downloading again :|
  • I have the same issue.
  • Man I can't wait to move my 950XL from production over to this build channel! Hopeully just a couple more releases and there won't be any more deal breaker bugs!!!! YEAH!
  • You can't add a new card or pay with an existing card in Wallet? So, in other words, Wallet does not work at all. Just say, Wallet does not work at all.
  • Yep. Not you can't add or use
  • May be you can remove the cards added to the wallet :P
  • Is there any cool new features in any of the creators update for Mobile? This is more like redstone 2.5
  • Okay few more issues I've found. One handed option still dont allow to see bottom of screen as it would be in full screen, option needs to have a turn me off option. Share to Facebook crashes app. Camera is very unhappy in dark conditions, should have kept Lumia camera. Random reboots still happening. Keyboard seems to be fixed. Outlook mail losing accounts and randomly meeting. Battery drain seems to have dropped slightly. Although recommend not unplugging if you intend to use for long periods, yeah that's how well the drain gas been fixed. Seems most issues from last build are still in this build, plus bt fault and continuum fault. But they have fixed an icon emoji thing and seem proud about it (sigh).
  • Some quick actions wont work like flashlight when u turn it on it wont stay on and when u try to access the Bluetooth setup the settings menu crash
  • This creators update is amazing! I can until Redstone 3 when we can get more iconography and emoji! Wonderful features
  • Well, at least it's a build. I don't know, I'm really excited for the Creator's Update on my PC but overall the Anniversary Update was much more exciting. Even for Mobile. I'm hopeful Redstone 3 is better (especially for Mobile) but I don't know.
  • Redstone 3 can't be any more disappointing than this build so far for mobile ☹
  • Don't jinx it.
  • Thank god for a share icon.... but can I run my non-UWP/WP8 apps finally which I haven't been able to run since 14977? Considering most apps in the platform arguably aren't UWP, this would seem to be a showstopper to me.  It's been painful not being able to use my password manager (LastPass, among other apps) since December!!!
  • You mean subway surfer
  • I've had no issue using lastpass on my Lumia icon... In fact their auth app's two stage push auth has been working better for me since the last build.
  • I've been running all of the RS2 WIF builds on my 950XL and haven't encountered any issues with LastPass yet.
  • It isn't just LastPass.  I only used it as an example, becuase it's the most painful to not be able to run.  I have to resort to either the web, or looking passwords up on another device and typing them in by hand. I haven't been able to run ANY non-UWP apps for about 5 builds now. Older WP apps either hang on the splash screen, if they have one, or hang on the good old "Loading..." screen until you just give up.   It's been reported at least a half a dozen times in the Feedback Hub... I know, because I think I've upvoted every one. LOL