Android How to

How to Unlock Bootloader on Samsung Devices

unlock bootloader on samsung

The Linux platform-based Android OS is really customizable and really easy to use for any user or developer actually. Just like many other devices, the Samsung Galaxy device bootloader runs whenever the device turns on. It decides if to load the recovery or load Android OS. It also packs the boot file, kernel, and system framework, which also helps to boot your device smoother and faster every time. In this article, we are going to talk about How to Unlock Bootloader on Samsung Devices. Let’s begin!

If you are getting bored of the old stock UI or recovery and want a new custom recovery as well. Or flashing a Custom Firmware or also Root your handset, unlocking the device bootloader is the first preference. Without bootloader unlocking, you guys really can’t proceed to the next steps. The smartphone OEMs don’t give an unlocked device bootloader because of device security or privacy concerns. However, if you’re an advanced user or a developer, you can also unlock it accordingly. Please note that unlocking the device bootloader may void the device warranty (if applicable) actually.

What is Bootloader?

A device bootloader is a really code or a program that starts whenever the device is powered on to select and run the operating system on our device each time we boot our handset. It basically tells the operating system and kernel in order to run the recovery mode or initiate the boot process in the system as well. It’s also worth mentioning that the device bootloader can be found on each operating system running devices or also gadgets such as smartphones, tablets, PCs, etc.

Because of Android’s open-source nature, it’s really easy to unlock the device bootloader. Through unlocking it, you will be able to flash any third-party Custom ROM, Root, Mod files, Custom Recovery, and much more. This will provide you simple access to tweak your Android device. Just like that, you can even lock the bootloader.

What is Bootloader Unlock?

A Bootloader is mostly locked on an Android device because of system security or privacy-related measures. As the Android OS is an open-source platform and anyone can also do anything with it. Smartphone OEMs always want to stick to their skin and OS version that is specially developed and designed for their very own device models. That’s why most of the OEMs don’t provide an unlocked bootloader out-of-the-box.

Unlocking the device bootloader opens the gateway for the Android device users towards its unlimited possibilities of customizations and many other features. It’s also worth mentioning that the stock firmware is limited along with customizations, and users may not play along with it deeply. Whereas after you unlock the device bootloader, users can quickly flash the custom firmware. Custom recovery file, install root access, and third-party modules, and much more. So, it’s always important to unlock the bootloader if you’ve made up your mind to flash custom files as well.

Pros of Unlocking Bootloader

  • Just flash Custom ROMs
  • Install a Custom Recovery (TWRP) as well
  • Then install Root access (SuperSU or Magisk)
  • Some OEMs are already giving a bootloader unlocking method or tool.

Cons of Unlocking Bootloader

  • Through unlocking the device bootloader, your device warranty may void
  • You may not experience a just like that device performance.
  • Improper bootloader unlocking may end along with a boot loop or brick your device.
  • Handset privacy or also security measures may get affected.
  • The bootloader unlocking method will delete all the device data completely.

What is Fastboot? | unlock bootloader on samsung

Fastboot is a really useful command-based tool that works only in the bootloader or fastboot mode as well. It also offers to flash fastboot files or image files easily on your handset. You guys can recover stock recovery, unlock the bootloader, reset phone data, and much more with many commands.

With just opening your device in fastboot mode and connecting it along with your PC, put in particular commands and enjoy the changes. It’s worth mentioning that the Fastboot tool and method are straightforward and really easy to use. You have to follow the specific commands step-by-step to get results.


  • You will need a PC or Laptop and a USB cable for this.
  • Keep your device charged at least more than 60% before doing anything.
  • Then download the ADB and Fastboot Tools on your PC and install them for Windows.
  • Make sure to take a complete backup of your device (No Root) as well.

Steps to Unlock Bootloader on Samsung device

This method works only on devices that also came out of the box along with Android 9.0 Pie or above.

  • First of all, turn on Developer Mode
  • Open the Settings application
  • Scroll down and click on the Developer Options option
  • Then toggle the OEM Unlock option on

unlock bootloader on samsung

  • Confirm through tapping the enable option.
  • Now power off your device. Press Bixby + Volume Down and plug in your device to a PC to boot into download mode
  • Long press volume up in order to unlock the bootloader. This will clear your data and automatically reboot
  • Just when you guys think the bootloader is unlocked, surprise, surprise, it is actually not! Samsung introduced inVaultKeeper the system. That means the bootloader will reject any unofficial partitions before explicitlyVaultKeeper permit it.
    • Go through the initial setup as well. Skip through all the steps as data will be wiped again later when we are installing Magisk as well. Then connect the device to the internet in the setup, though!
    • Turn on developer options, and confirm that the OEM unlocking option exists and grayed out! The VaultKeeper service will also unleash the bootloader after it proves that the user has the OEM unlocking option enabled as well. This step is to make sure the service gets the correct info and also double-check that our device is in a correct state as well
    • Your bootloader now accepts unofficial images in download mode too, a.k.a actual bootloader unlocked :D. Follow on in order to read the rest of this guide.
  • That’s just it! You guys have unlocked the bootloader on your device.

Steps in order to Unlock Bootloader on Samsung Galaxy Phones Without PC (Recommended)

Well, if your Samsung Galaxy handset runs on MediaTek chipsets or Qualcomm or Exynos processors in Asia or Europe or the China region as well. It’s pretty easy to unlock the device bootloader or turn on OEM Unlock.

  • First, just enable the Developer options on your Galaxy device.
  • Then head to the phone Settings menu.
  • Now scroll down to the bottom part and click on the About Phone section > tap on Build Number 7 times continuously.
  • Then head back to the main Settings menu again and then scroll down a little bit.
  • Tap on the Developer options > turn on the toggle OEM Unlock.
  • You’re all done. Enjoy!

Steps to Unlock Bootloader on Samsung Galaxy Phones via PC (ADB & Fastboot)

Many time, the device manufacturer doesn’t permit to unlock of the device bootloader easily. You may have to get permission and get the code from your manufacturer at first as well. But, if you get the code, follow the steps mentioned below:

  • Turn on Developer options and OEM Unlock at first on your handset. Already mentioned in method 1.
  • Then you have to enable the USB Debugging and the Developer options to connect with your PC.
  • Download and extract the Download ADB & Fastboot zip file on your Windows PC and then install it.
  • Connect your phone to the PC through the USB cable.
  • Whenever the device is connected, switch off your phone and then open the fast boot mode.
  • Now, head to the ADB & Fastboot folder on your PC, tap on Shift Key + Right Mouse Click on a blank area to open the Windows command prompt.
  • Then type the following command in CMD:
adb devices
  • You may get a pop-up to permit USB Debugging on your phone. Just click on the OK button.
  • Now type the next command below and tap on enter:
adb reboot bootloader
  • Now, your phone reboots into bootloader mode as well, check if your phone is showing the locked bootloader or not. If yes, then type and tap on enter the below command:
fastboot devices
  • Your device fastboot number will also appear on the ADB & Fastboot screen. That means you guys are ready to proceed. If not, then try the process again properly as well.
  • When your phone is recognized, then just follow the next command:


This will delete all the device data completely actually.
fastboot oem unlock
  • You’re all done. In order to reboot your device into the main system, now type the following command and hit enter button:
fastboot reboot
  • At last, your phone will reboot into the system. Now, wait for the complete boot process.
  • Now enjoy!


Alright, That was all Folks! I hope you guys like this article and also find it helpful to you. Give us your feedback on it. Also if you guys have further queries and issues related to this article. Then let us know in the comments section below. We will get back to you shortly.

Have a Great Day!

Also See: Android 6.0.1 USB Settings – Set Default USB

About the author

Windy Moore

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