Samsung has not yet revealed its Android 4.4 upgrade plans for its large array of smartphones, but a leaked document suggests that development on that front is already underway. With an already botched Android 4.3 update for the Galaxy S3, Samsung should take its time with the next update.
According to the leaked document, the Samsung Galaxy S4 will get updated to Android 4.4 KitKat in January 2014 alongwith the Galaxy Note 3, while the Galaxy S3 and Note 2 will get their respective updates sometime in March or April 2014. The update path is quite clear, lets see if Samsung sticks to it this time around.