Upgrading from Android 5.0 (Lollipop) to brings tangible benefits:
> fastboot flash boot boot.img > fastboot flash system system.img > fastboot flash recovery recovery.img
If you haven't received an Over-the-Air (OTA) notification, you can update manually:
Upgrading from Android 5.0 (Lollipop) to brings tangible benefits:
> fastboot flash boot boot.img > fastboot flash system system.img > fastboot flash recovery recovery.img asus zenfone selfie z00ud firmware 6.0 1
If you haven't received an Over-the-Air (OTA) notification, you can update manually: Upgrading from Android 5