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
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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.

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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.

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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.

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

Workaround :
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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

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

Workaround :
Reboot your phone and those apps should work fine thereafter.
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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 :
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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.