Below is the official list of Asus ZenFones that gets Android 9 Pie (ZenUI) update in 2019, however no ETA is available now. The list includes ZenFone 4, ZenFone Max, and Asus ROG Phone. ZenFone 5 and 5Z have already upgraded to latest Android version, while ZenFone Max Pro (M2) is undergoing Android Pie beta testing.
If you have not upgraded your ZenFone 5 and 5Z to Android 9 Pie yet, check our previous guide to know how to download latest Pie firmware from Asus’s website for your device and flash it manually on the device.
Asus ZenFones Gets Pie update in 2019
Android 9.0 (Pie) update will bring revamped ZenUI, dark theme, new navigation gestures and new volume menu (like Google Pixel 3) on the device. Pie’s native features like Adaptive battery, adaptive brightness, etc. will reduce battery usage and latest security patches will improve the security of the device. Recently, Asus invited Android 9.0 (Pie) beta testers for its entry-level device Zenfone Max Pro M2. It is available through Asus’s Beta Power User Program. The beta program is for early adopters and power users of ZenFone who have knowledge on Android firmware and willingness to provide feedback of testing. [Source]