Sony has announced through their twitter account confirming that there’s a new firmware update that have been rolling for Xperia Z, ZL, ZR & Tab Z handsets. This update was already confirmed by Xperia blog that the said update comes in the form of build version (10.3.1.A.2.67) and currently hitting Xperia Z devices. This new firmware update still packed in Android 4.2.2 (Jelly Bean) and its said that it brings display, camera, battery fixes & performance tweaks, according to Sony.
Confirming: new firmware 4.2 rolling JB (phased) for # XperiaZ, ZL, ZR & Tab Z – Brings display, camera, battery fixes & performance tweaks
Sony Xperia Z, Xperia ZL, Xperia ZR & Xperia Tab Z owners should now start seeing this update until this couple of days, since the roll out is in stages. This is just a minor update in particular but it includes fixes of several known bugs, and for better performance of the mentioned Xperia devices.