For those on 'production' Windows 10 Mobile though, which will be those who upgraded on the likes of the Lumia 640, 735, 830, 930 etc. plus all the native Windows 10 Mobile phones, this is a significant update from the initial Anniversary Update rollout, and brings:
(some of the stuff below refers to Windows 10 on the desktop, so take these items with a pinch of salt)
- Improved reliability of Windows Shell, map apps, Internet Explorer 11, and Microsoft Edge.
- Addressed issue causing push-button reset to not work correctly and roll back on devices with language set to any of the Unicode languages.
- Addressed issue causing devices to not recognize a Secure Digital (SD) card if it is inserted and removed multiple times.
- Addressed issue causing some apps to not respond to the commands in the app bar in Windows 10 Mobile.
- Addressed issue that sometimes blocks alarm notifications in Windows 10 Mobile.
- Improved support for using the camera app in Windows 10 Mobile Enterprise.
- Addressed additional issues with rendering 4K resolution, missing Start menu tiles when running on battery, Internet Explorer 11, Microsoft Edge, Bluetooth compatibility, graphics, display rotation, app compatibility, Wi-Fi, Feedback Hub, Miracast, Windows Shell, revised daylight saving time, and USB.
- Improved reliability of Microsoft Edge, File Server, Windows kernel, Microsoft Store.
- Improved performance for the speed of purchasing Store apps.
- Improved battery life of wearable devices (such as the Microsoft Band) while Bluetooth is connected and idle.
- Addressed issue with incorrect character mapping between Japanese and Unicode for the question mark (?) symbol.
- Improved support for new near-field communication (NFC) chips for Windows 10 Mobile.
- Addressed issue with game or app audio not resuming after ending a call on Windows 10 Mobile.
- Improved reliability of the Windows Ink Workspace, Microsoft Edge, File Server, Windows kernel, Microsoft Component Object Model (COM), Cluster Health Service, Hyper-V, Multi-Factor Authentication (MFA), NTFS file system, PowerShell, Internet Explorer, facial recognition, graphics, Microsoft Storeand Windows Shell.
- Improved performance for the speed of purchasing Store apps.
- Improved battery life of wearable devices (such as the Microsoft Band) while Bluetooth is connected and idle.
- Addressed issue with incorrect character mapping between Japanese and Unicode for the question mark (?) symbol.
- Improved support for new near-field communication (NFC) chips for Windows 10 Mobile.
- Addressed issue with game or app audio not resuming after ending a call on Windows 10 Mobile.
- Addressed additional issues with compatibility, Remote Desktop, BitLocker, PowerShell, Direct3D, networking policies, Dynamic Access Control (DAC) rules, Microsoft Edge, Connected Standby, mobile device management (MDM), printing, Fingerprint logon and Cortana.
As usual, you can update by looking in Settings/Update & Security. Comments welcome if you run a 'production' build like this day to day!