Sony launched earlier said somewhere is going to Android 4.2 update as soon as possible to the top of his blockbuster this year's Xperia Z. Bang go some time, but now the first signs of this update has revealed. New FW certificate code is 10.3.A.0.407, high ability is Android 4.2.2 Android 4.3 even.
The reason for higher grounds to predict that Android 4.2 is because Android 4.1 firmware version currently on Xperia Z is so groundbreaking 10.1.1.AX to 10.3 is definitely a big change in version Android rather than just fix normal bugs.
However, the strange thing is that a different version based on Android 4.1.2 FW 10.1.1.A.1.319 is also certified the same day (4/6) with FW Android 4.2 and above. According to information from a number of members on XDA 2, both of them are certified for Xperia Z version for the U.S. T-Mobile network are C6606 and C6616. Upcoming Sony will enter the U.S. market via T-Mobile's network so users can this version will be updated first and then to the world. In summary showed signs of Android 4.2, we can still last a little excited.