Sony had previously said that the Sony Xperia ZR Android 4.2 update would be available around the middle of August, although it looks like some users have started to receive the update a little earlier.
The update comes in the form of Android 4.2.2 Jelly Bean, and it is being rolled out as an over the air update, with users in Norway reporting they have received the update.
It is not clear as yet on whether the Sony Xperia ZR Android 4.2 update is being rolled out in stages, if you have received the update leave a comment and let us know, also let us know which country you are in.
Source Xperia Blog