Last week Sony announced that the Android Lollipop update would be rolling out to their Xperia Z3 and Sony Xperia Z2 devices.
Now some versions of the Sony Xperia Z2 have started to receive the Android 5.1.1 Lollipop update, this includes the Xperia Z2 smartphone with mobile carrier Vodafone.
We can expect the Android 5.1.1 Lollipop update to roll out to other Xperia Z2 devices, including the Z2 tablet shortly.
As soon as we get some more details on when the update will be released for other devices, including the unlocked versions of the tablet and also smartphones, we will let you guys know.
Source Xperia Blog