How to Unlock bootloader on Samsung Galaxy M03?

If you are here to root, then you should know that before rooting you have to unlock the bootloader, and today in this article we will tell you how you can unlock the bootloader on your Samsung Galaxy M03. And bootloader allows the user to install custom firmware, Fastboot ROM, and get superuser rights, and we will tell you even more. So stay with us till the end.

What is Bootloader?

Bootloader is software that helps to start the computer after installing the operating system. This causes the system to load it into memory and conduct the process of transferring it. That is, the bootloader is a piece of software required to start the computer and start the operating system that is being installed.

Why do people unlock the bootloader?

There can be many reasons for unlocking the bootloader. First, it allows users to install unauthorized operating systems on their devices, allowing them to customize their phones to their liking. This allows them to better secure their devices and experience the latest features. Unlocking the bootloader allows users to access their device’s system files and change them to suit their needs.

What are the advantages of unlocking the bootloader?

  • Freedom and Control: Unlocking the bootloader gives you complete control over your device. It allows you to customize your phone just the way you want it.
  • Custom ROM Installation: Unlocking the bootloader allows you to install custom ROMs on your device, which can give you new and improved features and experiences.
  • Automated System Tweaks: Unlocking the bootloader allows you to automate system tweaks to your phone, which can improve the device’s performance.
  • Upgrade Your Phone: Unlocking the bootloader allows you to upgrade your phone to the latest Android versions, giving you the ultimate security and features.

What are the disadvantages of unlocking the bootloader?

  • Security may be weak: Unlocking the bootloader may compromise the security of the user’s device, as an unlocked bootloader can allow unauthorized software to be installed.
  • Guarantee Loss: Unlocking the bootloader can put the user at risk of losing the guarantee of the device, as companies do not guarantee the unlock.
  • Problems with Software Updates: Due to an unlocked bootloader, it may be difficult to install official software updates, causing the user to not get the latest security and features.
  • Risk of data loss: Due to an unlocked bootloader, a user’s data may get hacked due to weak security, increasing the risk of personal information.
  • Maximum Stability Loss: After unlocking the bootloader, the stability of the device may decrease or increase due to unauthorized software.


  • First, you enable developer mode on your device and unlock the OEM features.
  • You need an original USB cable to attach to the PC.
  • You need to download and install ADB and Fastboot Tools to run commands.
  • Take a full backup of your all-important data.
  • Make sure your device’s battery is charged to more than 75%.

Warning: Kindly don’t forget to back up all of the crucial information on your device. When the procedure is finished, all data will be erased.

Let’s Unlock Bootloader on Samsung Galaxy M03

A smartphone’s bootloader can be unlocked using a variety of techniques, depending on the model. The strategy indicated below might be your best bet if you’re searching for a more conventional approach. We are going to unlock the bootloader on your Samsung Galaxy M03.

  • Open Settings > Go to About Phone > Click on Software Info.
  • Now find the build number and “click on it” until developer mode becomes active.
Enable Devloper Option
  • Go to Developer Mode and allow OEM unlock and USB debugging.
Enable USB Debugging
  • Now install the required ADB and Fastboot tools on your laptop or PC.
  • Now connect your smartphone to your PC or laptop through a USB cable.
  • Open the command prompt on your PC or laptop.
  • To verify that your smartphone is properly connected to your PC or not, type a command on cmd: “adb devices.”
  • To check whether the bootloader is working on your device, type the command “adb reboot bootloader.”
  • Type the command “fastboot oem unlock” to complete the process.
  • Wait while the bootloader unlocking process is complete, and then restart the device with the “fastboot reboot” command.
  • Fantastic! You have successfully unlocked the bootloader of your Samsung Galaxy M03. You now have access to your device’s full potential.

Related post: How to Root Samsung Galaxy M03

Frequently Asked Questions (FAQs)

Q- Does installing TWRP unlock bootloader?

Ans. No, installing TWRP itself doesn’t unlock the bootloader. You typically need to unlock the bootloader before flashing a custom recovery like TWRP. Follow proper procedures for your device to avoid complications and ensure successful installation.

Q- Can I install custom ROM without bootloader?

Ans. No, installing a custom ROM usually requires an unlocked bootloader. The bootloader is essential for flashing custom software on the device. Ensure your bootloader is unlocked before attempting to install a custom ROM.

Q- Will GPAY work in unlocked bootloader?

Ans. Google Pay may not work on devices with an unlocked bootloader or rooted systems due to security concerns. Unlocking the bootloader may compromise the device’s safety features, affecting payment apps. Consider the implications and potential restrictions before unlocking the bootloader if using Google Pay is essential.

Final Thoughts:

Hey friends! Today, we have told you how to unlock the bootloader. We hope you will succeed in the process, and we hope that you all have understood very well and unlocked the bootloader of your Samsung Galaxy M03. If you have any questions related to this, you can ask them in the comment box. And thanks for reading till the end.

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