OnePlus has started rolling out the Oxygen OS 3.1.0 update for the OnePlus 2 based on Marshmallow. The list of changes in the update include Fixed some notification issues Improved Doze Mode performance Added media sound toggle for alert slider Addressed alert slider/silent mode issue Implemented August 1 security patches for Android Implemented Quadrooter patch General bug fixes The update is now rolling out incrementally and should be available to everyone soon. Alternatively, you can download the update and flash it manually. Source
Source: http://www.gsmarena.com/oneplus_2_gets_oxygen_os_310_update-news-20432.php
