Sony is continuing to polish firmware for the Xperia Z2 and Xperia Z2 Tablet, as another minor Android 4.4.2 KitKat update has been certified for both devices with build number 17.1.A.2.55. This follows on from the previously certified version with build version 17.1.A.2.49. With the Xperia Z2 expected to start shipping in limited quantities later this month, it could mean this update is a day one update.
Xperia Z2 (D6502, D6503) firmware certified (17.1.A.2.55)
Xperia Z2 Tablet (SGP521, SGP541) firmware certified (17.1.A.2.55)