Update: Check out a video (in Czech) of the official firmware below. Also if you want to download the FTF firmware files then click here.
Sony Xperia Z1 Compact Android 4.4.2 KitKat changelog (14.3.A.0.681)
– Updated Camera application and overall tuning to improve the camera experience
– Enhanced email app
– A tweaked Status Bar and Quick Settings – More intuitive and customisable
– The same launch animation and live wallpaper as the Sony PlayStation 4 adapted across the lock and home screens
– Sony’s native app portfolio will be updated to the latest versions. This includes Messaging, MyXperia, Smart Connect, Small apps, TrackID, TrackID TV, Sony Select and Smart Social Camera
– Updated Media apps including WALKMAN, Album and Movies. Better Sony Entertainment Network & PlayMemories integration with a more intuitive UI and faster download speeds
– Stability, performance & battery improvements
– Answering machine option added in Call menu
– “Take screenshot” option returns in Power off menu
– Default SMS app can be switched to Hangouts
– Battery icon changed
– Switch between Notifications and Quick Settings from the drop down menu
– Touch block Small app included
– Calendar app updated
– Transparent status bar
Via XDA-developers.