Asus is now rolling out Android 8.0 Oreo update V126.96.36.199 for ZenFone 3 Zoom. The new Android OS comes with new features like Parallel Apps, Picture-in-Picture, Smart text selection, new design for Quick Settings, and other features.
The firmware update also includes device stability improvements. Additionally, the update comes with latest Android March Security patch which brings fixes for Common Vulnerabilities and Exposures discovered in the Android operating system.
ZenFone 3 Zoom V188.8.131.52 update will gradually release to everyone. You can also check manually for updates, go to Settings > About device > System update.
Make sure you have enough charge on your device at least 60% to 70% before downloading the update.