Zenfone 5Z "Flagship" gets Pie by the end of January 2019.
https://www.techdroider.com/2018/11/asus-zenfone-5z-gets-android-pie-jan-2019.html
https://www.techdroider.com/2018/11/asus-zenfone-5z-gets-android-pie-jan-2019.html
Techdroider
Asus Zenfone 5Z gets Android 9.0 Pie by the end of January 2019
Now that Google has released the next version of Android, Android 9.0 Pie, the wait for the devices to get the update first has already started. Asus today announced that the Zenfone 5Z will be getting Official Android 9.0 Pie by the end of January 2019.