Install LineageOS on
ASUS Zenfone 2 (720p)
Do not continue after something fails!
- Read through the instructions at least once before actually following them, so as to avoid any problems due to any missed steps!
- Make sure your computer has
fastboot. Setup instructions can be found here.
- Enable USB debugging on your device.
- Boot your device with the stock OS at least once and check every functionality.
Warning: Make sure that you can send and receive SMS and place and receive calls (also via WiFi and LTE, if available), otherwise it won’t work on LineageOS either! Additionally, some devices require that VoLTE/VoWiFi be utilized once on stock to provision IMS.
- LineageOS is provided as-is with no warranty. While we attempt to verify everything works you are installing this at your own risk!
Unlocking the bootloader
Download the bootloader unlock app for your device:
- Navigate to ASUS’ support site and go to your device’s page by entering its model number.
- Click Driver & Tools.
- Select Android from the drop-down menu.
- Open the Utilities section.
- Download the Unlock Device App.
- If the downloaded file is packaged in a
.ziparchive, extract it.
- Connect the device to your PC via USB.
- On the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window and change to the location where the Unlock Device App
- Install the
adb install Name_of_unlock_app.apk
- For example, on the ZE551ML device, it would be
adb install UnlockApp_ze551ml_20150723.apk.
- For example, on the ZE551ML device, it would be
Run the application Unlock Device Tool from the device and agree to the terms.Note: After you agree to the terms, the ASUS unlock app might ask you to login with your Google account. If your password does not work, then you need to enable temporary access for less secure apps here. If you have two-factor authentication enabled on your Google account, you will have to generate an individual app password on the Google accounts settings website, as the unlock app does not natively support two-factor.
- Press the button to unlock your device.
- The device should automatically reboot into bootloader mode and the message
unlock successfully...reboot after 5 secondsshould be displayed. The device will then reboot and load Android.
Installing a custom recovery using
- Download a custom recovery - you can download TWRP. Simply download the latest recovery file, named something like
twrp-x.x.x-x-Z008.imgand rename it to
recovery.img.Important: Other recoveries may not work for installation or updates. We strongly recommend to use the one linked above!
- Connect your device to your PC via USB if it isn’t already.
- If your device isn’t already in fastboot mode, on the computer, open a command prompt (on Windows) or terminal (on Linux or macOS) window, and type:
adb reboot bootloader
You can also boot into fastboot mode via a key combination:
- With the device powered off, hold Volume Up + Power.
- Once the device is in fastboot mode, verify your PC finds it by typing:
If you don’t get any output or an error:
Tip: Some devices have buggy USB support while in bootloader mode, if you see
- on Windows: make sure the device appears in the device manager without a triangle. Try other drivers until the command above works!
- on Linux or macOS: If you see
no permissions fastboottry running
fastbootas root. When the output is empty, check your USB cable and port!
fastboothanging with no output when using commands such as
fastboot getvar ...,
fastboot boot ...,
fastboot flash ...you may want to try a different USB port (preferably a USB Type-A 2.0 one) or a USB hub.
- Flash recovery onto your device:
fastboot flash recovery recovery.img
- Now reboot into recovery to verify the installation.
Do not reboot into the existing OS, since it will overwrite the recovery you just installed!
With the device powered off, hold Volume Up + Power. On the next screen (fastboot mode) use Volume Down to scroll to “RECOVERY” and then press Power to select.Note: If you can’t power down the device, try long-pressing the key-combination (if any was used in the instructions above) until the device reboots and follow the instructions above
Installing LineageOS from recovery
- Build a LineageOS installation package.
- If you are not in recovery, reboot into recovery:
- Now tap Wipe.
- Now tap Format Data and continue with the formatting process. This will remove encryption and delete all files stored in the internal storage.
- Return to the previous menu and tap Advanced Wipe, then select the Cache and System partitions and then Swipe to Wipe.
- Sideload the LineageOS
- On the device, select “Advanced”, “ADB Sideload”, then swipe to begin sideload.
- On the host machine, sideload the package using:
adb sideload filename.zip.Tip: Normally, adb will report
Total xfer: 1.00x, but in some cases, even if the process succeeds the output will stop at 47% and report
adb: failed to read command: Success. In some cases it will report
adb: failed to read command: No erroror
adb: failed to read command: Undefined error: 0which is also fine.
- Repeat the sideload steps above for all desired packages in sequence.
Once you have installed everything successfully, you can now reboot your device into the OS for the first time!