19 August 2014
Kitkat support on Zenfone is still under construction, it’s in the final testing stage. I believe it’ll be coming very soon, please stay tuned. Of course, android L is also on our road map! Remember always keeping an eye on our web site for the further news about L. :)
ASUS has done some remarkable work with the OTA updates, the most recent of which added USB OTG support for the Zenfone 5. And their statement which says they will update the phones to Android L shows their commitment.
We will keep you updated on more information about this.
Update: You can find screenshots from the update and instructions to manually download and install it here.