Sony promised us that its new flagship Xperia Z2 and Xperia Z2 Tablet devices will launch in March 2014 with Android 4.4.2 KitKat. Well it looks like the launch will be on track as the first firmware builds for these devices have just been certified by the PTCRB. The 17.1.A.0.504 build was certified on 24 February, along with an older 17.1.A.0.391 build a few days before.
We expect both of the above builds to relate to Android KitKat. This firmware has been certified for the Xperia Z2 HSPA+ model D6502 (L50w, the Chinese model number) and the LTE model D6503. It has also been certified for the Xperia Z2 Tablet LTE model SGP521 and HSPA+ model SGP541.