Sony is delivering on its promise dating back to October last year to bring Android Marshmallow to the Xperia Z2, Xperia Z3 and Xperia Z3 Compact. After a Beta build wasreleased a month ago, users of the smartphones are starting to receive the official update.The firmware, carrying a build number 23.5.A.0.570, brings the OS version to the latest 6.0.1, and includes the February Android security