Update [Oct 24]: Android 8.1 Oreo with ZenUI 5.0 is now available for ZenFone 4 Max ZC520KL model too as version 15.2016.1809.407.

A few days ago, Asus started rolling out Android 8.1 Oreo updates to the ZenFone 4 Selfie and Selfie Lite and today, a similar update is now available for the ZenFone 4 Max ZC554KL handset.

The update is available over the air and installs software version 15.2016.1809.412, but we still don’t know when the ZC520KL model will join the party, although we expect it to. Like its counterparts, the update also installs a new ZenUI 5.0 skin on the ZenFone 4 Max alongside plenty of bug fixes and security enhancements.

Related: ZenFone 4 Android Pie update news

Being an OTA update of a major OS, expect a huge file. To avoid any interruptions, make sure you have connected to a stable Wi-Fi network to upgrade to Oreo 8.1. You can check if the update is available for your device via Settings > System > System updates.