Sony is currently rolling out Android 6.0 Marshmallow update to Xperia Z5 Series, Xperia Z3 Plus and Z4 Tablet. Earlier some days Xperia Z5 Series got Marshmallow update in Japan over docomo network. Now Sony is rolling out the update to global variants.
#Android 6.0, Marshmallow rolling for Xperia Z5 series, Z4 Tablet & Z3+ – rollouts are phased, check locally & watch for the notification
— Sony Xperia News (@SonyMobileNews) March 7, 2016
You will get Android 6.0 Marshmallow update on Xperia Z4 Tablet, single-SIM Xperia Z3+ and the firmware build 32.1.A.1.163 is currently live across all variants of the Xperia Z5. Although Xperia Z3 Plus Dual Sim will get the update soon as reported on Xperiablog.
The update also includes the Android February Security Patch along with Android 6.0 marshmallow with features like Doze mode, app permissions, and Google Now on Tap. There’s also a new Sony launcher in this update. It also comes with some changes in the user interface and improvements across the board.