Better late than never, Sony users should be thrilled that the sony is finally rolling out Marshmallow updates Xperia Z2 (D6503), Xperia Z3 (D6603) and Xperia Z3 Compact (D5803). Earlier, it included Z5 and Z5 Compact. The update firmware 23.5.A.0.570 should be available via automatic updates- or via Sony PC Companion.
It shouldn’t take long to see Sony rolling out updates for more of its devices. The new update also includes Camera 2.0.0 interface and February Android security patch.