Sony is now rolling the Android 4.3 Update for its Xperia Z, ZL and ZR. The update brings in many firmware improvements in the Bluetooth, Battery, and much more.
Sony had earlier announced that it will be updating it’s devices but the update had run late. Also Sony is way out of the run as HTC One and Galaxy S4 have already received the KitKat flavour. While the Xperia Z is only getting the Android 4.3 Update now.
The official logcat is not available at the point of time so there is no exact written information that tells what all improvements the update brings in. Also the update would soon be made avalanche and pushed to the Xperia Z tablet as well and ETA would be announced next week.