Asus had already rolled out KitKat updates on its ZenFone series. Some users had already mentioned about the update on the ZenFone 4 a few days back. The KitKat update has now been rolled out on Asus Zenfone 4, Zenfone 5 and Zenfone 6.
It would be wise to wait for few more days to check if there are no issues. Usually there should not be any issues however in case you don’t want to take the risk better avoid updating for few days. Asus Zenfone users might have already got the notification regarding the update. In case you did not get the notification just go to settings, about phone and in software options tap the software update button.
This is not the first time Asus has rolled out updates for their Zenfone model, they had provided few updates before for some minor software issues / bug fixes etc, but this one is new, it replaces the current Android 4.3 with Android 4.4.
Before the update make sure the battery % is over 75 and if possible take a backup of your data.
If you own any of the Zenfone models and have upgraded to the latest ROM Android 4.4, do leave your feedback or any issues you might have encountered.