Win10 Mobile Preview 14385 Update has been fixed with a summary of known issues

Win10 Mobile build 14385 has been fixed and improved: You can open PDF files in Microsoft Edge, and you can use touch to interact with PDF (such as scrolling, panning or zooming) and no longer load PDFs. We have improved the battery life of older devices such as the Lumia 830, 930 and 1520. Fixing the problem of setting the SIM card name on a dual SIM card phone sometimes fails. Known Issues for Win10 Mobile build 14385: The voice recorder does not always display the option for phone recording. We listened to the feedback and are working hard to fix it. The keyboard in private mode in Microsoft Edge cannot be displayed all the time. We are working hard to fix this problem. One workaround is to click the Microsoft Privacy Statement hyperlink on the page and then the keyboard is available in the Search/Address Bar. Reminder: We have changed the backup format of Windows 10 Mobile devices to reduce the amount of backup capacity stored in OneDrive. As a result of this, if you back up on a device running the latest Windows 10 Mobile Insider preview and go back to the Windows 10 Mobile release Build 10586 and then recover from your backup, your start screen layout cannot be restored. And will keep the default layout, your previous backup will be overwritten. If you want to temporarily return to Build 10586, once you run Build 10586 you should disable the backup so that the backup of Win10 Mobile Preview is not overwritten.

Related Reading: Win10 Mobile Preview 14385 Update Fixes and Known Issues Summary

Win10 Mobile/PC One Anniversary Update 14385 Quick Preview Fast Track Update