How to Relock Asus Zenfone Max Pro M1 Bootloader

Yesterday, we wrote an article explaining how to unlock the bootloader of Asus Zenfone Max Pro M1, after which you can install a custom recovery such as TWRP, root your phone and do tons of customisations. However, unlocking the bootloader typically voids the warranty of your phone, except in certain OEMs like Xiaomi and OnePlus, therefore it is important to relock the bootloader before you can avail warranty from ASUS.

Note – I unlocked my bootloader using the unofficial method posted on XDA and relocking the bootloader using the below procedure worked for me. But there is no confirmation of this method working for phones whose bootloader was unlocked using the official method.

Relocking your bootloader will ERASE ALL OF YOUR DATA from your device such as apps, photos, messages, and settings. Take a backup of your data before proceeding. WebTrickz is not responsible for anything happening to your phone. The steps we have given have been personally tested by the author of this article and are safe.

Steps to Relock Zenfone Max Pro Bootloader

Make sure to take a backup of entire device data. (SD card will NOT be wiped)

  1. Download and extract it to a folder on your desktop.
  2. Power off your phone. Then press Power and Volume Down key together, to boot into fastboot mode.Zenfone Max Pro M1 Fastboot mode
  3. Connect your Asus Zenfone Max Pro M1 to the PC using a USB cable.
  4. Windows will now automatically detect the device and start installing the fastboot drivers for it. If not, download and install these ASUS drivers.
  5. Open the directory where you extracted the file from #2.Relocking Zenfone Bootloader
  6. In that directory, open a file named relock_bl.cmd
  7. A Command (CMD) prompt will do the rest of the work for you.
  8. Let the phone restart.
  9. It will then erase all the data on your phone (excluding Micro SD card).
  10. Now the phone won’t show the “bootloader unlocked” warning that was displayed before you relocked the bootloader.

Congratulations, you have successfully relocked the bootloader. Now, you can avail the warranty of your ASUS Zenfone Max Pro M1 without any issues.

 Source – XDA Forums

Jay Mehta

Jay is a part time student and a full time geek. He spends his time browsing tech forums, reading books, and fixing stuff. He currently owns a Poco F1 and an Asus Zenfone Max Pro M1.

17 Responses

  1. Shashank singh says:

    Will relocking remove the custom recovery and root access???

  2. Gajendra says:

    its not working bro, i tried it today and it shows RED STATE
    your device is corrupt. and it wont safe to boot
    pone will shut down in 30s.

  3. Pravee Kumar says:

    I have asus zenfone 3 laser

    can you please share how to relock bootloader. I have installed stock rom in this phone but still getting warning about the bootloader that has unlocked.

  4. Anup says:

    I have unlocked my Asus Zenfone 5z with an official bootloader unlocked are there solutions to how I can relock back. Please anyone help me out?

  5. YZ says:

    worked to relock asus max pro m1 mobile bootloader.

  6. Dipak says:

    thank you sir it\’s working I unlocked my bootloader using the unofficial method posted on XDA and now i back to stock and locked my phones bootloader ..

  7. vernon says:

    not working relock, it shows Alert and no boot on bootloader mode

  8. akash says:

    even i m in the same stage now what to do… is it locked or we have to flash stock rom… the red stage alert doesnt gives the phone to boot…. what to do anyone please help me,,,,…

  1. May 17, 2018

    […] Also Read: How to Relock Asus Zenfone Max Pro M1 Bootloader […]

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