Android 4.4.4 KitKat has already appeared on the Sony Xperia E3, but only the HSPA+ models (D2202 and D2212). The LTE variants of the Xperia E3 (D2203 D2243 and D2206) are currently still running Android 4.4.2, but that may soon change as new build number 18.5.C.0.19 has been certified for these handsets. This would move the build from the current 18.4.C.2.14 build. We’ll let you know once the update starts rolling.