Sony Mobile has started rolling out the Android 6.0 Marshmallow update for the Xperia C4 and Xperia C4 Dual smartphones. The update carries the firmware number of 27.3.A.0.122 for the former and 27.3.B.0.122 for the latter.
Currently, the update is available for E5303 and E5306 variants of the Xperia C4 and the E5333 and E5343 variants of the Xperia C4 Dual. However, it is expected that the other two variants of these smartphones – E5353 and E5363 will also get the update soon.
Obviously in this update you can expect to see all the Marshmallow goodies, including Google Now On Tap, Doze battery saving feature, new app permissions system and more.
As always, the update is rolling out in stages, so it will take a few days to reach all the variants out there. You can always check for the latest software update manually by heading to Settings -> About Device -> Software Update.