How to relock Bootloader on a Samsung Galaxy smartphone?

Most Samsung Galaxy smartphones come with numerous advanced features and customizations out of the most. Developers and advanced users prefer to unlock the bootloader and flash third-party files on their devices.

This gives benefits like flashing custom firmware, enabling root access, installing custom recovery, and more. However, if you want to sell your device to someone, you will have to relock bootloader. If you don’t relock bootloader, each time the user boots their device, an unlocked bootloader warning message will appear.

If you’re looking to find out how to do that, then this guide is perfect for you. In this guide, you will get to know how to relock bootloader on a Samsung Galaxy smartphone.

Pre-requisites to follow

  • You should remember that when you relock bootloader, it’ll delete all the device data like files, media, documents, and more. You must take a complete backup of your data before you get started.
  • You will need a PC or laptop and a USB cable
  • Download the ADB and Fastboot Platform Tools for your PC
  • Install the latest Samsung USB Drivers on your PC
  • Ensure that you turn on the OEM unlocking and USB debugging on your smartphone
  • Download the stock firmware version for your Samsung Galaxy smartphone and extract it on your PC
  • Download the latest ODIN tool

Steps to relock bootloader on a Samsung Galaxy smartphone

How to relock Bootloader on a Samsung Galaxy smartphone?

  • First, you need to boot your Galaxy smartphone into the Download mode
  • To do that, power off your device and then press and hold the Bixby + Volume Down buttons simultaneously for a few seconds
  • You shouldn’t release the buttons and connect your Galaxy smartphone to the PC using a USB cable
  • A blue warning screen will appear
  • Long-press the Volume Up button for entering the “Device Unlock Mode”
  • Your smartphone will prompt your to confirm if you’re looking to relock bootloader
  • Press the Volume Up button for confirming the bootloader relock on your Galaxy device
  • Once it is done, your smartphone will automatically reboot and the bootloader will be locked once again
Aviral Sharma
Aviral Sharma
Aviral Sharma is a talented and passionate writer who has been using words to express his thoughts ever since he learnt how to hold a pen. He is passionate about outer space, history, sports and most importantly technology. Aviral is a regular writer for rootmygalaxy.net and has been getting better by the day.

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