Fix: How to Relock Bootloader on Any Samsung Galaxy Phones?Hot to

Even though having an unlocked bootloader on an Android device can be helpful in a number of ways, especially if you’re a developer or an advanced Android user who wants to do things like flash custom firmware, install custom recovery, give root access, install custom modules, etc., it can sometimes be a hassle for some users because of privacy or security concerns. You can easily find out how to Relock Bootloader on any Samsung Galaxy Phone if you own a Samsung Galaxy and want to return to the bootloader that was locked by the manufacturer.

The locked bootloader of an Android device is thought to be safe and secure by Google’s SafetyNet feature. However, whenever it detects any system firmware modification, rooting, or bootloader unlocking status, it eventually prevents the proper operation of applications-related services like online payment and banking. Relocking the bootloader has numerous advantages as well, even though Magisk-rooted devices can use all apps and services without restriction.

Nowadays, Samsung Galaxy devices come pre-loaded with numerous advanced features and customization options. However, the majority of advanced users prefer to unlock the bootloader and flash third-party files on their phones in order to gain access to more modifications and administrative privileges over subsystem files. However, you might need to relock the bootloader if you want to sell your phone to someone else. In any case, each time the client boots the gadget, an opened bootloader cautioning message will show up.

What is Bootloader?

A gadget bootloader is a code or a program that begins when the gadget is turned on to pick and run the working framework on our gadget each time we boot our handset. It basically instructs the kernel and operating system to launch the system’s boot process or enter recovery mode. It’s also important to note that every device with an operating system, including smartphones, tablets, PCs, and so on, has a bootloader.

Because of Android’s open-source nature, it’s very simple to open the gadget’s bootloader. By opening it, you will actually want to streak any outsider Custom ROM, Root, Mod records, Custom Recuperation, and the sky is the limit from there. You will have simple access to modify your Android device with this. In a similar vein, we will demonstrate how to relock the bootloader in this guide.

How to Relock Bootloader on Any Samsung Galaxy Phones?

It’s likewise worth focusing on that a bootloader-opened gadget consequently voids the Google Play Insurance Confirmation and prompts unusable administrations like Netflix on your handset. Therefore, relocking the bootloader is always preferable unless you are a fan of third-party firmware or require root access. Fortunately, here we’ve imparted to you a full-profundity guide on how you can relock the bootloader on your Samsung Universe gadget. Therefore, without further ado, let’s get started.

1. Things to Remember:

  • After installing TWRP or enabling Root access on your Samsung Galaxy device, the Samsung KNOX security will be tripped.
    • Samsung KNOX security can’t be reverted once tripped even after installing the stock firmware via the Odin tool. So, keep that in mind.
    • Tripped KNOX security indicates you won’t be able to use Samsung Pay, Secure Folder, and more.


If you don’t follow the steps correctly or skip any method, the process of relocking the bootloader may go awry. We at Alliptvs are not liable for any damage or error that may occur to your phone as a result of following the guide. Take a complete backup, and do this on your own time.

2. Requirements

  • Relocking the bootloader will erase all the gadget information like inner stockpiling records, archives, media, and so forth. Therefore, prior to beginning the procedure for relocking the bootloader that follows, be sure to make a complete backup of all of your data.
  • For this, you will need a USB cable and a PC or laptop.
  • Before you do anything, ensure that your device is sufficiently charged.
  • On your PC, download the ADB and Fastboot Platform Tools for Windows and Mac.
  • The Samsung USB Drivers should be installed correctly on the computer.
  • On your Samsung Galaxy phone, make sure that USB Debugging and OEM Unlocking are turned on. To do this:
  • Go to the Settings menu of your Android gadget.
  • After that, scroll down and select About.
  • Presently you want to make a beeline for Programming Information>> More.
  • Here, tap the Build Number approximately seven times until the message “You are now a developer” appears.
  • Return to the past settings menu > Tap on Designer Choices.
  • Turn On the OEM Unlock toggle. If prompted, tap on Enable. [Important]
  • Similarly, Turn On the USB Debugging toggle.
  • You should also download the currently running stock firmware version for your Samsung Galaxy model from this guide link. After downloading the firmware (zip) file, extract it on the computer.
  • Download the latest ODIN Tool version here.

3. Steps to Relock Bootloader on Samsung Devices

  • First of all, you’ll need to boot your Samsung Galaxy device into the Download Mode. To do this:
    • Power Off your Samsung Galaxy device completely.
    • Then press and hold the Bixby + Volume Down buttons together for a few seconds.
    • Don’t release the buttons and immediately connect your Galaxy phone to the PC via a USB cable.
    • A blue ‘Warning’ screen will appear on your Galaxy device > Now, long-press the Volume Up button to enter the ‘Device Unlock Mode’.
  • Your device will now prompt you to confirm if you want to relock the bootloader or not.
    • As we’re interested in relocking the bootloader, press the Volume Up button to confirm the bootloader relock on your Samsung Galaxy device.
  • Once done, your handset will reboot automatically, and the bootloader will be locked again.
  • You’re good to go. Enjoy!

4. Restore or Reinstall the Stock Firmware on Samsung Galaxy

If you’ve installed the third-party firmware then even after relocking the bootloader, your handset will be still in the Download Mode consisting ‘VBMeta: Error Verifying vbmeta image’ message at the top. Therefore, you’ll need to flash the Stock ROM on your Samsung Galaxy handset manually by following the full-depth guide here.

That’s it, guys. We assume this guide was helpful to you. For further queries, you can comment below.

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