The Bluetooth SIG has certified the Android 4.4.3 KitKat firmware update for the Sony Z Ultra Google Play edition. The certificate below shows the “Togari GPE” (Togari is the Z Ultra’s codename) certified with software version KTU72.S1.3013. The KTU72 part of the build is widely believed to a reference to Android 4.4.3 KitKat. Obviously there’s no timeline for release, but given the certification it shows the update will roll very soon after it hits Nexus devices.
Via Blog of Mobile.