A few days back, we saw a new Android 4.4.2 KitKat firmware build certified for the Xperia Z, ZL and Tablet Z. The same build was conspicuously missing for the Xperia ZR (C550X), fear not though as firmware version 10.5.A.0.230 has been certified for both C5502 and C5503 models.
This build has now been certified for all variants of the Xperia Z, Xperia ZL, Xperia ZR and Xperia Tablet Z. We would expect KitKat for these handsets to launch within a matter of weeks, if not earlier. We’ll keep you posted.