Microsoft Edge (rebranded from Project Spartan)
- Address bar at bottom
- Include option to view website in desktop or mobile view
- IMPORTANT NOTE: Any favorites, cookies, history and Reading list items that you had saved in the Project Spartan app to be lost after upgrading from a previous Windows 10 Mobile Insider Preview build.

General UX improvements and refinement
- Fixed an issue where many Live tiles pinned to Start would appear blurry
- Updated icons and visuals (such as the volume controls).

Improvements to Cortana
- Can now set up Quiet hours in Cortana's Notebook

Flashlight quick action in Action Centre
- No longer need third party app

Updated Photo app
- GIF support (only for phone with 1GB of RAM or higher)

Automatic camera upload via OneDrive
- Now managed directly with the OneDrive app on your phone

Various first-party app update
- Outlook Mail
- Outlook Calendar
- Music
- Movies & TV
- News
- Weather
- Sports
- Money

- Call + SMS filtering would not work after upgrade.
- Text notifications weren’t appearing for incoming messages.
- Podcast app wouldn’t work.
- Apps were having trouble installing or updating via the Store Beta.
- Navigation bar couldn’t be hidden

Issue :
There is an issue where the Install button doesn’t respond after Build 10149 is downloaded

Workaround :
Make sure the battery is charged >40% and press it again.
-------------------------------------------------------
Issue :
Some people may encounter an 80091007 error trying to upgrade to this build from Build 10136.

Workaround :
Use the Windows Phone Recovery Tool to go back to Windows Phone 8.1 and then upgrade to Build 10149.
-------------------------------------------------------
Issue :
The Insider Hub is removed in this build.

Workaround :
None
-------------------------------------------------------
Issue :
Sometimes the PIN keypad won’t be shown after swiping up to unlock.

Workaround :
Swipe down to get to Action Center and try to open a notification or Settings to invoke the PIN keypad to unlock your phone.
-------------------------------------------------------
Issue :
There is a very rare situation where you are unable to unlock your phone after entering your PIN and it keeps letting you type even though you entered your pin correctly.

Workaround :
Leave the phone alone 1-2 hours before trying to unlock again. This is caused by a TPM issue that could get worse and require you to reflash if you get into this state and power off the phone.
-------------------------------------------------------
Issue :
If a Gmail account is set up on the phone, the Messaging app may have issues and both incoming and outgoing messages may not work.

Workaround :
simply reboot your phone to get it working again. We are aware that the Messaging app may behave badly in this state.
-------------------------------------------------------
Issue :
There is a known issue where apps or games are installed as trial versions even though you have previously purchased them. In-app purchases on Windows 10 Mobile are not functional yet as we migrate the function to the new Windows Store.

Workaround :
None
-------------------------------------------------------
Issue :
In certain cases, the colors in some apps may appear off. For example – the titlebar in the Outlook Mail app is orange.

Workaround :
None
-------------------------------------------------------
Issue :
There might be some cases where notifications in Action Center appear blank.

Workaround :
None

One Store app
- The Store Beta has been renamed to just Store and the old Store has been removed.

The size of the battery icon is now larger
- Easier to see

- Missing post-upgrade migration status screen which made the lock screen appear frozen without the date and time for up to 10 minutes.

- Unable to unlock your phone after entering your PIN and it keeps letting you type even though you entered your pin correctly that was caused by a TPM issue.

- The colors in apps should now appear correctly

- Improved reliability of app downloads and updates from the Store (which is now no longer marked as “Beta” and the old Store has been removed).

None

Nothing to see here

- Set the Lock screen and background image from within the Photos app.
- Apps installed on SD cards weren’t working after a reboot
- Improved Latvian and Chinese inputs
- Improvements to the Kid’s Corner tile layout
- Improved reliability of Data Sense notifications
- Modified Shape Writing algorithm to be less aggressive in suggesting contact names over common words
- Camera would not launch when the phone was locked
- Notifications for incoming text messages weren’t appearing
- The touch screen wouldn’t be responsive after ending a phone call on some devices
- Folder tiles have obviously overlapping text

Issue :
Mobile hotspot doesn’t work in this build. When sharing the Internet from your phone using mobile hotspot, devices will fail to get a valid IP address from your phone and will show no internet access.

Workaround :
None

-------------------------------------------------------

Issue :
Two-factor authentication for your MSA with a phone number doesn’t work in this build. If you reset your phone and go through the first run experience, you won’t be able to input more than 2 characters for validating phone or text authentication.

Workaround :
Add secondary email for two-factor authentication

-------------------------------------------------------

Issue :
Apps that use background audio such as Groove, Podcast, Pandora, etc. will crash when launching after receiving an app update from the Store

Workaround :
Rebooting the device will resolve this issue

-------------------------------------------------------

Issue :
Some phones with a large number of tiles pinned to the Start screen may get stuck in a state where the device shows “Loading…”

Workaround :
Reset or rolled back to Windows Phone 8.1 using Windows Phone Recovery Tool

-------------------------------------------------------

Issue :
Some apps may fail to update through the Store with the error code 0x80073cf9

Workaround :
Uninstalling the application and reinstalling it will resolve this issue

-------------------------------------------------------

Issue :
The Movies & TV app will not work in this build (video playback is currently broken)
Fixed with latest Movies & TV app update

Workaround :
Use third-party app like VLC

Get missed call notifications and send texts on your PC with Cortana
- Cortana will notify you on your PC (running build 10565 or higher) that you missed a call
- To send text, just speak or type "text" and the name of the contact to Cortana

Skype messaging, calling and video experience
- Messaging apps now supports animated GIF
- Now includes the ability to search your messages
- The Phone app also has the ability to search for contact from call history

Cortana improvements
- Track your leaisure time, including movie and event reminders
- Give you helpful information to know where to go and to get there on time
- Include option to book and track an Uber ride directly in Cortana (by saying "Book an Uber)

Offline maps in SD card
-

Photo app improvement
- Include option to mark local photos as favorites and have them shuffle on the live tile
- Improve zooming viewer performance and file information
- New launch points for rich editing
- Added additional context menu (access by press and hold the photo)

Storage settings improvement
- Improve UX for common experience on PC and phone
- Allow you to install applications to SD card or USB drive

- Notifications, such as new messages, can be received without first unlocking the device.
- Cortana’s background activity has been optimized for power usage.
- We have fixed some of the issues that were causing the Start screen to not load. Additionally, we have made some performance improvements to the Start screen.
- We have made performance improvements to Action Center, including swipe to expand and dismiss notifications. Swiping to expand or dismiss notifications should happen more quickly.
- The alarm icon now appears on the Lock screen when an alarm is set in the Alarms & Clock app
- The proximity sensor during calls is now behaving as expected on devices that may have previously failed to turn the screen off.
- App downloads in the Store were sometimes getting blocked by a service hanging in the background – this should be resolved and app downloads should be more consistent.
- The keyboard will switch languages less aggressively now.
- Taping restart for apply an update will reboot the device immediately now.

Issue :
Visual Voicemail sync is broken on some devices.

Workaround :
You may need to call your voicemail directly within the Phone app > Settings > Change more settings for Phone > Call Voicemail.

-------------------------------------------------------

Issue :
Opening message threads within the Messaging app will crash on dual SIM phones if the second line’s Messaging tile is removed from the Start screen (even if only a single SIM is used). The second line’s Messaging app will also appear to be removed from the All apps list.

Workaround :
To work around this issue, the second line messaging tile must be linked to the first line messaging tile by opening up the first line in the Messaging app then go to Settings > Link tiles.

-------------------------------------------------------

Issue :
On Dual SIM devices, unpinning the second line Phone tile from the Start screen will make the entry disappear from the All apps list.

Workaround :
Rebooting the phone will cause the tile and application to both reappear.

-------------------------------------------------------

Issue :
Photos cannot be selected for sharing through third party apps like Facebook, Facebook Messenger, Instagram Beta, WhatsApp etc.

Workaround :
-

-------------------------------------------------------

Issue :
Some devices will get into a state where the Phone app will continually crash upon launch.

Workaround :
Resetting the device will recover it from this state

-------------------------------------------------------

Issue :
Devices that have updated from Windows Phone 8 to Windows Phone 8.1 may lose the ability to connect to Wi-Fi on Windows 10 Mobile Insider Preview builds or may fail to update to Windows 10 Mobile Insider Preview builds all together.

Workaround :
You can use the Windows Device Recovery Tool to first update your device to Windows Phone 8.1 and then upgrade to the latest Windows 10 Mobile Insider Preview build.

Nothing to see here

- “Hey Cortana” should work again in Windows 10.
- You can now select photos for sharing through third party apps like Facebook, Facebook Messenger, Instagram Beta, WhatsApp etc.
- Battery life should be improved in this build. We fixed several bugs impacting battery life.
- You couldn’t choose some apps to show quick status on the Lock screen via Settings > Personalization > Lock screen.
- Improvements to text prediction and auto-correction.
- Video recording functionality has been improved.
- Visual Voicemail sync should now work properly.
- Dual-SIM issues that appeared in Build 10572.
- Chinese Pinyin QWERTY keyboard stopped working after upgrading from Windows Phone 8.1.

Issue :
As with previous builds, after applying this update the device may appear at a black screen for about 5 minutes when transition between the spinning gears and the final stages of update.

Workaround :
Just be patient and it should progress past it. Exact time will vary by device.
-------------------------------------------------------
Issue :
You will be unable to set your default save locations via Settings > System > Storage and will not correctly reflect the current storage settings. If you are using a SD card in your phone, it will show up as a garbled name in Storage settings. Whatever you had configured for your save locations in the previous build will be the same.

Workaround :
-
-------------------------------------------------------
Issue :
After moving some apps to a SD card, those apps might crash.

Workaround :
Reboot your phone and those apps should work fine thereafter.
-------------------------------------------------------
Issue :
Deploying Silverlight apps through Visual Studio to your phone won’t work in this build. You can deploy UWP apps to your phone without any issues.

Workaround :
-
-------------------------------------------------------
Issue :
If you restore a backup from a phone that had a different resolution, you may end up with a corrupted Start experience.

Workaround :
Go to Action Center (which won’t be corrupted) then Settings > Personalization > Start and apply a different background picture.

- The issue that caused the Start experience to become corrupted (garbled) after upgrading and restoring a backup from a phone that had a different resolution have been fixed.
- You should now be able to set your default save locations via Settings > System > Storage and it will correctly reflect the current storage settings.
- Your SD card should no longer show up as a garbled name in Storage settings either.
- Moving apps to a SD card should no longer cause those apps to crash.
- Improvements to the Messaging + Skype app – through both app updates via the Store and also on the server side.
- Less resuming/loading text when switching apps.
- The physical camera button should be working again if it wasn’t working for you before.
- Apps and games should download from the Store more reliably.

Issue :
After we released Build 10581 to Windows Insiders in the Fast ring, we discovered a bug in the build that will cause the filesystem to become partially corrupted after doing a factory reset. For those of you who did a factory reset of your phone, you most likely did not notice this issue on Build 10581. Due to this bug however, upgrading to Build 10586 will cause your phone to go into a reboot loop after the upgrade completes – rebooting at the Windows or operator logo.

Workaround :
To recover your phone, you can use the hardware key combination to reset your phone which will then put it at the OOBE experience on Build 10586. We highly recommend that you make sure you do a backup your phone *before* upgrading to Build 10586 due to this bug.

Additionally, you can also recover your phone by using the Windows Device Recovery Tool to go back to Windows Phone 8.1 and then upgrade to Build 10586.
-------------------------------------------------------
Issue :
Deploying Silverlight apps through Visual Studio to your phone still won’t work in this build. This issue will be fixed with the release of Visual Studio 2015 Update 1 on Nov. 30th.

Workaround :
-
-------------------------------------------------------
Issue :
There is a known issue where the tile for Insider Hub still remains under All apps but doesn’t open. Insider Hub isn’t included in this build.

Workaround :
-