The Sony Xperia M2 and the Xperia M2 Dual, which were launched in India in April at a starting price of Rs. 21,990, have now been updated to Android 4.4.4 KitKat. The devices were originally launched with Android 4.3 Jelly Bean, but Sony updated them to Android 4.4.2 in August.
The update version 18.3.1.C.0.21 fixes the audio delay bug which was introduced with the update to Android 4.4.2 but it is not clear if Sony has fixed the battery drain issue. Sony is yet to comment whether it will update the device to Android 5.0 Lollipop.