“April Cumulative Update”
◾Reliability, performance and stability improvements.
◾Support for Visual Voicemail on Dual SIM phones.
◾Improvements for Bluetooth connectivity, including the reliability of connecting to and staying connected with Bluetooth devices.
◾Fix for a problem that caused audio playback to get occasionally interrupted in Groove Music and other music apps when phone display was turned off.
◾Improvements for Microsoft Edge browser, including support for configuring a prompt before a file download occurs, support for background downloads, and a fix for a problem where opening a link from an another app wouldn’t load the web page.
◾Reliability improvements for Cortana reading text messages aloud and usability improvements for Quiet Hours feature.
◾Improvements for Store reliability, including a fix for a problem that prevented some apps from being updated and installed.
◾Fix for a problem that occasionally caused some apps to show blank tiles after upgrading from Windows Phone 8.1.
◾Improvements for PC connectivity via USB on some phones that were upgraded from Windows Phone 8.1.