How to Unlock Bootloader via Fastboot on Android

Unlocking bootloader on Android devices paves the way for more flexible customization. It helps you install custom ROMs, apply themes, flash various MODs, etc. In this guide, we will help you unlock Bootloader of Android devices via Fastboot. Once you unlock bootloader, you can then flash SuperSU or Magisk to acquire root.

Unlocking Bootloader on Android devices is one of the easiest things to do if you have the proper tools and a good guide. But the problem with unlocking bootloader on Android device is that not all OEMs and carriers make it easy to unlock the bootloader. A few manufacturers, for some of their devices, make it mandatory to request a code from them to unlock bootloader. Without the unlock code, you would never be able to unlock bootloader.

Unlock Bootloader on Android

But fortunately, these days, many manufacturers support direct bootloader unlock. In this guide, we will concentrate on the device that allows to easily unlock bootloader without the need for any type of code from the manufacturers. You can simply execute some fastboot commands (we will come to that in a bit) and your device bootloader will be unlocked.

Heads up: Unlocking bootloader on your Android device will completely wipe your device. All your data will be lost. Please do make a complete backup of your device before proceeding. Here’s a guide on how to backup your device: Guide to Backup Your Android Device Without Root.

Steps to Unlock Bootloader via Fastboot

  1. Download and Install ADB and Fastboot on your PC.
  2. Enable USB debugging and OEM Unlock on your Android device.
  3. Go to the folder where ABD and Fastboot are installed on your device.
  4. Open a command prompt from inside the folder.
    └ Hold down shift and right clock on the empty space inside the folder. Select ‘Open command window here’ or ‘Open PowerShell window here’.
  5. Once the command window opens up, connect your Android device to your PC.
  6. In the command prompt, execute the below command:
    adb devices
  7. If this is the first time connecting your device to PC, you might get a prompt on your phone which asks ‘Allow USB Debugging?’. Tap on the checkbox which says ‘Always allow from this computer‘ and tap OK.Allow-USB-Debugging
  8. Now execute the below command to reboot your device in to bootloader mode:
    adb reboot bootloader
  9. Once your device is in bootloader mode, execute the following command in command prompt:
    fastboot oem unlock
  10. [Not applicable to all devices] You might get confirmation screen on your device. If you do, use the volume buttons to select Yes and press the Power button to confirm the selection.
  11. Once the bootloader unlock process completes, your device will again reboot into bootloader mode. Execute the following command to reboot your device:
    fastboot reboot
  12. Now your device will reboot into Android OS.

Note that the first boot after unlocking the bootloader will always take longer than usual; be patient. You might see a few steps where your data is being formatted. Upon successful boot, you might get prompted to set up your device, as all the data is now gone. Go ahead and setup your device. This is the easiest way to unlock bootloader via Fastboot on Android devices.

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3 thoughts on “How to Unlock Bootloader via Fastboot on Android”

  1. My Xiaomi Redmi 5A ( RIVA ) was error at the command “fastboot oem unlock”. I already have inserted the command to the CMD ( Command Prompt ) and then an error message popping up, and it says, “( remote: token verification failed, reboot the device )” and then my device rebooted for like 1 second and back again to Fastboot mode. Can you help me fix this error?
    PS : My device was fail too when i use Xiaomi Unlock.

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