Install /e/ on a Asus Zenfone Max Pro M2 - “X01BD”
- Take a backup of all important data on your phone before proceeding.
- A guide on backing up with TWRP is available here
- Ensure your phone is charged more than 50%
- Check that
fastbootare enabled on your PC. If not you can find the setup instructions here
- Download all the files and images mentioned in the download section below before starting the installation
Make sure you have a working data cable to connect your device to the PC. There are cables which are only for charging and do not transfer data.
- Enable USB debugging on your device. You can find the instructions here
Downloads for the X01BD
To understand the difference between /e/OS builds check this guide
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
Run the application Unlock Device Tool from the device and agree to the terms.
Follow the steps as given on the ASUS support site to complete the unlock process
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.
Booting a custom recovery using
Before proceeding ensure you have downloaded the custom recovery from the link given in the Download section above
Connect your device to your PC via USB.
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 Down + Power. Keep holding both buttons until the word “FASTBOOT” appears on the screen, then release.
4. Once the device is in fastboot mode, verify your PC finds it by typing:
no permissions fastbootwhile on Linux or macOS, try running fastboot as root
5. Flash a recovery image onto your device by typing
fastboot flash boot recoveryfilename.img
on some devices the below command may be required
fastboot boot recoveryfilename.img
fastboot flash recovery recoveryfilename.img
Replace the recoveryfilename with the name of the recovery image you downloaded
6. Now reboot into recovery to verify the installation.
Installing /e/ from recovery
Before proceeding ensure you have downloaded the /e/OS for your device, from the link given in the Downloads section above
If you aren’t already in recovery mode, reboot into recovery mode by typing the below command in the console of an adb enabled PC
adb reboot recoveryTip: You can also do this manually using the below key combination
- With the device powered off, hold Volume Down + Power
In TWRP return to main menu, then tap
Format Dataand continue with the formatting process.
Here a new screen may show where you will have to type
Yesand confirm the action by clicking a button.Caution: Format Data will remove encryption as well as delete all files stored on the internal storage. Remember to take a backup first. Check Requirements section above.
Return to the previous menu and tap
Systempartitions to be wiped and then
Swipe to Wipe
Sideload the /e/ .zip package.Tip: Sideload requires actions in two places to be done. One on your phone in the TWRP UI and secondly on the connected PC which should have adb enabled. Also note the sideload process while running may stop abruptly around 50%. The console would show a message
Total xfer: 1.00x. This would mean that the transfer has successfully completed.
- On the device in TWRP,
ADB Sideload, then swipe to begin sideload.
- On the host machine, in the console , start the sideload of the package by typing
adb sideload filename.zipTip: Change the filename to the name of the file you downloaded
- On the device in TWRP,
Once installation has finished, return to the main menu, tap Reboot, and then System
To find some troubleshooting tips… click here
- Getting a
Total xFer ':' 0.01xmessage - Try to upload the /e/OS to internal storage and retry to install
adb ':' sideload connection failed ':' insufficient permissions for deviceerror - Try to execute the commands
adb start-serverand retry
adb shell twrp install /sdcard/</e/ zip package>raise non-existent directory error - Try to check solution here
- Getting an
insufficient permissionserror - Try the solution given here
- When running "adb devices" in bash a device is shown as "unauthorized" - Try the solution given here
- Errors while running TWRP version 3.4.x.x or above - Try downloading and using a previous TWRP version.. below 3.4.x.x
- In TWRP if this error shows up
failed to mount /preload- Try in TWRP
wipescreen in advanced menu select
swipe to wipe
/cache/recovery/xxx -> no such file or directoryerror while flashing a ROM - On PC run
adb shellin the console now create a folder called recovery for e.g. here the devicecode name is violet "violet :/cache# mkdir recovery"
- Issue specific to S9 and S9+ - Please refer this guide