This new 80.30.96.111 update further enhances Zenfone 5Z. The OTA update starts rolling out with build number WW_80.30.96.111 and as usual, the firmware update rollout is incremental, so it will take few hours or even few days/or weeks to reach the OTA on all devices.

Changelog of 80.30.96.111 update: If you have not received the OTA notification for the update (ZenFone 5Z ZS620KL_ WW_80.30.96.111), check it manually. To do so, go to Settings > System > System updates to check for the update.

Manual Installation:

Experienced users can install the update manually. ASUS has made available full firmware for download, if you cannot install the OTA or if you are out of Wi-Fi coverage area. You can download full firmware for ZenFone 5Z ZS620KL variant from this link. Check your SKU version before downloading the firmware. Check this guide/this guide for reference. Suggest to backup data before starting the software update. [Source]