Official Android 4.4.4 KitKat from Sony Mobile is now available to Xperia Z devices and as of August, users of latest models are eligible to download and install the firmware.

Sony Xperia Z1, Xperia Z Ultra and Xperia Z1 Compact

First batch to receive the Android 4.4.4 KitKat from Sony Mobile includes Xperia Z1, Xperia Z Ultra and Xperia Z1 Compact. Android 4.4.4 KitKat international software has the build version 14.4.A.0.108 while users in Germany, Spain and the Netherland are receiving 14.4.A.0.133 from Vodafone. Android 4.4.4 KitKat features the following enhancements and improvements:

- Android 4.4.4 including the latest enhancements and security updates from Google

- Updated and improved camera experience

- Improvements to Google Voice, Google+, Contacts and music streaming

- Latest versions of all Sony native and media apps

- Latest bug fixes, optimisations and improvements

Users of Sony Xperia Z1S in the United States are also eligible to Android 4.4.4 KitKat upgrade. It features a new user interface experience, personalised themes, SmartConnect updates, Calendar and Contacts user interface updates, new Movie Creator and Portrait Retouch camera apps.

Sony Xperia Z, Xperia ZL, Xperia ZR and Xperia Tablet Z

Android 4.4.4 KitKat firmware for Sony Xperia Z has been spotted at Sony Mobile forums via uploaded image carrying the latest build 10.5.1.A.0.283. PTCRB recently certified this firmware build version and it is compatible to Xperia ZL, Xperia ZR and Xperia Tablet Z as well.

All of these devices are going to be updated from firmware build version 10.5.A.0.233 running Android 4.4.2 KitKat. Users at the official forum site of Sony Mobile are expecting bug-fixing patches related to the poor battery performance of the previous update linked to Google Play Services version 4.4.52.

However, there are no reported details yet about the changes, improvements and enhancements of Android 4.4.4 KitKat for older Xperia Z series. Owners can simply expect similar upgrades provided from the change logs on Xperia Z1 and Xperia Z1S smartphones.

According to the Australian network carrier Telstra, Android 4.4.4 KitKat update is expected to be released on September 22. It is currently being scheduled for testing phase which was delayed by Sony for two weeks.