If you own a ASUS Zenfone 4, here is some good news for you. ASUS announced on its twitter feed that it is rolling out the Android 4.4 KitKat update for ASUS Zenfone 4. At the moment, ASUS Zenfone 4 runs on Android 4.3 Jelly bean. Even Zenfone 5 and 6 run on same Android 4.3 Jelly bean.
Even though Zenfone 4 users may feel good on finally receiving the Android 4.4 KitKat update for their device, the Zenfone 5 and Zenfone 6 users may be feeling bad that Android 4.4 KitKat update is not yet being rolled out for their devices.
— ASUS (@ASUS) October 1, 2014
Sometime back we reported that Android 4.4 KitKat update for Zenfone 5 is in final testing phase along with Android L update confirmation by ASUS, hence hopefully the update will be rolling out for other devices too as soon as possible.