Google has begun pushing the Android 5.1 Lollipop update to several Play Edition smartphones, including the HTC One M8 and the Sony Xperia Z Ultra.
Android 5.1 makes a number of improvements to the devices’ performance, and also adds several new features. Google tweaked the Quick Settings menu, added support for HD voice, improved security by blocking non-authorized device resets, and changed how users adjust notifications and alerts.
Play Edition handsets, which are available directly from Google, are unlocked and run a native version of Android. They are entirely devoid of manufacturer and carrier user interface overlays.
The Android 5.1 Lollipop update is free to install.
