Another Windows 10 Redstone 5 Bug Bash is right now underway, but that hasn't stopped Microsoft rolling out Windows 10 Insider Preview Build 17728 (RS5) to Insiders inside Fast ring.

This new build introduces several changes, improvements and fixes, and Microsoft also used this new flight to detail the forthcoming Your Phone app that will soon allow iOS and Android users to sync content utilizing their phones for the Windows 10 PC.

Making the app announcement, Microsoft says:

Coming soon, we're bringing the main set of features to one's Phone app for Windows Insiders haveing a Android device. Snap a pic in your Android, think of it on your PC. You may finally stop emailing yourself photos. For your Phone app, your Android's newest photos sync for ones PC automatically. Really should try to add a photo towards your presentation? Aspire to spruce up that selfie with a Windows Ink action? Just drag and drop.

iPhone users aren't missed out either. For any, Microsoft says:

For iPhone users, Your Phone app assists you to link your phone towards your PC. Browse the net on your phone, then send the webpage instantly to one's computer to add where you left off and away to continue what you're doing -- read, watch, or browse aided by the benefits of a larger screen. That has a linked phone, continuing on your hard drive is one share away.

Returning to the new build, there are a lot of improvements for Narrator, including:

Reliability: Made improvements in Narrator reliability.
Scan Mode: Reading and navigating within Scan Mode continues to be improved. Selecting text in Scan Mode has been specifically improved. Selecting forward in Edge has some known issues that are being actively investigated.
QuickStart: The website in settings to relaunch the QuickStart should now reliably work and will launch with the very first Welcome page. The QuickStart must more reliably take focus when Narrator is launched, that means Narrator should start reading it automatically.
Providing Feedback: The keystroke to be able to feedback is different. The new keystroke is Narrator + Alt + F. This works both in the Standard and Legacy layouts. Note: The Legacy layout also helps you use Narrator + E to email feedback.
Move Next, Move Previous, change View: When changing Narrator's view with the idea to characters, words, lines or paragraphs the Read Current Item command will terms and conditions text of their specific view type more reliably.
Keyboard command changes: The keystroke to handle to beginning of text is different to Narrator + B (was Narrator + Control + B), Turn to end of text has evolved to Narrator + E (was Narrator + Control + E).
Braille: Improved a chance to access Braille commanding utilizing the Narrator key inside the braille display.

General changes, improvements, and fixes in this build include:

Fixed what the problem is resulting in the Clock & Calendar flyout sometimes not appearing as soon as you clicked Start or if the Action Center. This same issue impacted both notifications along with taskbar jump lists appearing.
Fixed something resulting minimized apps having squished thumbnails in Task View.
Fixed a situation where when open Task View would crash should pressed Alt+F4 and Timeline was enabled.
Fixed a challenge where Timeline's scrollbar didn't work with touch.
Fixed one factor where the top border of UWP apps would remain accent colored despite the fact that having an accent colored border was disabled in Settings.
Fixed a situation resulting in the tops of apps in tablet mode being clipped (i.e. missing pixels).
Fixed a huge concern where the taskbar would stay with top of full-screened apps if you had previously hovered over any grouped taskbar icon generate up the extended listing of previews, but then clicked elsewhere to write it off.
Apps resize better now after monitor DPI changes.
Fixed a predicament where Find on site in Microsoft Edge would are amiss for open PDFs following the PDF was refreshed.
Fixed a subject where Ctrl-based keyboard shortcuts (like Ctrl+C, Ctrl+A) didn't work within editable fields for PDFs opened in Microsoft Edge.
Fixed a subject where the icons in the Microsoft Edge extension pane were drawing unexpectedly nearby the toggles.
Fixed an issue the spot where the enabled/disabled state of Fast Startup is usually reset to default after upgrading. After upgrading out of this develop your preferred state will persist.
Fixed an aspect where the Windows Security icon during the taskbar notification area (systray) would be described as a little bit blurrier everytime there was a resolution change.
Fixed problems where the USERNAME environment variable was returning SYSTEM when queried from an un-elevated Command Prompt in recent builds.
Fixed what the problem is where if for example the Narrator key is set they only have to Insert, sending a Narrator command out of your braille display should now function as designed no matter if the Caps Lock key's a part of the Narrator key mapping.
Fixed what the problem is in Narrator's automatic dialog reading where your title using the dialog is spoken multiple times.
Fixed the issue where Narrator won't read combo boxes until Alt + down arrow is pressed.

Known issues include:

Microsoft is progressing within work on adding dark theme in File Explorer and therefore the Common File Dialog - you'll notice improvements within this build, however, there are still get a few things left to enjoy. You may see some unexpectedly light colors an entire surfaces additional dark mode and/or dark on dark text.
There is a dilemma impacting WDAG, Remote Desktop and Hyper-V. Remote Desktop Client (mstsc.exe) users will discover a misleading error dialog complaining about low virtual memory should a connection continues to be established. As a good workaround, they can ignore that error dialog has been shown leaving it there. When they dismiss the mistake dialog, the marriage will be severed. And users won't be capable of use enhanced session in Virtual Machine Connection (vmconnect.exe). Being workaround, they can remain faithful to the non-enhanced session.
When you upgrade in this build you'll realize the taskbar flyouts (network, volume, etc) no more have an acrylic background.
When you use the Ease of Access Make Text bigger setting, you will see text clipping issues, or find out that text is not totally increasing sized everywhere.
When you set up Microsoft Edge as soon as your kiosk app and configure the start/new tab page URL from assigned access Settings, Microsoft Edge may well not get launched with all the configured URL. The fix for this issue really needs to be included in the next flight.
On Build 17723 (yet not Build 18204), it's possible that you'll see the notification count icon overlapping with all the extension icon for the Microsoft Edge toolbar when a part has unread notifications.
On Windows 10 in S Mode, launching Office from the Store may never launch with a error a good .dll not being built to run on Windows. Whole body message would be the fact a .dll "is either not created to run on Windows or it has an error. Try installing this course again…" Some people have most certainly been able to work with this by uninstalling and reinstalling Office from Store.
When using Narrator Scan mode perhaps you may experience multiple stops for getting a single control. Certainly one of the this is for people with an image this is also a link.
When using Narrator Scan mode Shift + Selection commands in Edge, which does not get selected properly.
Microsoft is investigating a prospective increase in Start reliability and also gratification issues in this build.
After generating Windows Mixed Reality headset responsible for on this build with motion controllers, the controllers may need to be re-paired again before appearing for the headset.
When by having a Windows Mixed Reality immersive app, saying "Flashlight on," may fail to activate the flashlight feature though the status appears as active on the Start menu.