Flashing firmware carries a risk of permanently damaging your device. Proceed at your own risk.

Hold simultaneously. Release when the phone vibrates. Flash Firmware:

This process will erase all data on your phone. Back up everything before starting.

To prevent your phone from immediately updating back to the version you just left: Go to .

Once complete, select "Wipe data/factory reset" , then "Wipe cache partition" , and finally "Reboot system now" . Method 2: ADB Sideload (For Older Zenfone 5 Models)

Type adb sideload [filename].zip (where [filename] is the name of your downloaded firmware).

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Zenfone 5 Firmware Downgrade < Hot >

Flashing firmware carries a risk of permanently damaging your device. Proceed at your own risk.

Hold simultaneously. Release when the phone vibrates. Flash Firmware: Zenfone 5 Firmware Downgrade

This process will erase all data on your phone. Back up everything before starting. Flashing firmware carries a risk of permanently damaging

To prevent your phone from immediately updating back to the version you just left: Go to . select "Wipe data/factory reset"

Once complete, select "Wipe data/factory reset" , then "Wipe cache partition" , and finally "Reboot system now" . Method 2: ADB Sideload (For Older Zenfone 5 Models)

Type adb sideload [filename].zip (where [filename] is the name of your downloaded firmware).