No one has managed to figure out what the changelog contains, but chances are pretty good that it will carry a slew of bug fixes as well as minor updates, considering how the Xperia Z1 Compact will skip Android 4.4.3 and go straight to Android 4.4.4 KitKat. Of course, this would also mean that the Xperia Z1 and Z Ultra too, will eventually be on the receiving end of the Android 4.4.4 KitKat update.
Just a quick rehash here on the Xperia Z1 Compact – there really isn’t anything “compact” about this, since it comes with a 4.3” 720p display, a 2.2GHz Snapdragon 800 processor, and a 20.7MP camera, alongside most of everything else that the Xperia Z1 has, allowing a more comfortable handset with flagship performance to make its mark.