Sony recently rolled android 4.4.2 KitKat update for Xperia E1 and Xperia E1 Dual and promised KitKat for Xperia M2 and Xperia M2 Dual will follow up soon. New Android 4.4.2 KitKat 18.3.C.0.37, 18.3.A.0.31 firmwares have been certified for Xperia M2 and 18.3.B.0.31 firmware for Xperia M2 Dual on PTCRB.
Android 4.4.2 build will hit Xperia M2 and Xperia M2 Dual with hopefully app to SD card support as spotted in Xperia E1, E1 Dual, T2 Ultra and T2 Ultra Dual’s KitKat update.[ UPDATE ] Xperia M2 18.3.C.0.37 firmware Android 4.4.2 KitKat update rolling. [ UPDATE ] Xperia M2 Dual 18.3.B.0.31 firmware Android 4.4.2 KitKat Rolling
Below you can see 18.3.A.0.31 firmware certification for Xperia M2 D2305.
Below you can see 18.3.B.0.31 firmware certification for Xperia M2 Dual D2302, S50h
Below you can see 18.3.C.0.37 firmware certification for Xperia M2 D2303, D2306.
Update roll out is expected soon and with this Sony will be done updating all Xperia 2014 handsets on KitKat version and then hopefully we will see KitKat update for Xperia SP and Xperia L ( any update for Xperia C is doubtful ).
Thanks Ben for the tip!