Sony Xperia Z Receiving New Update at Three Austria

The new firmware version appears to bring mainly bug fixes
by Ionut Arghire, June 21st, 2014
Android 4.4.3 KitKat Update for Sony Xperia Z Ultra Google Play Edition Gets Certified

Android 4.4.3 KitKat Update for Sony Xperia Z Ultra Google Play Edition Gets Certified

by Cosmin Vasile, April 18th, 2014
The update should be pushed OTA (over the air) in the next few days
Sony Xperia Z Ultra Google Play Edition Released with Android 4.4 KitKat

Sony Xperia Z Ultra Google Play Edition Released with Android 4.4 KitKat

by Cosmin Vasile, December 11th, 2013
Google states the phablet ships for free in 1 or 2 days
 
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