How to Unlock bootloader on Samsung Galaxy A02?


Hi there, mate! I hope you’re doing well. In this post, you will get complete information about how to unlock bootloader on Samsung Galaxy A02 smartphone.

As a techie person, you thrive on new technology and desire to have control over your phones. You will certainly need total access to the system files, which will be possible by rooting. Despite this, if you are looking for simple changes in the interface and want to flash a few ROMs, then you need to unlock the bootloader.

You don’t know what a bootloader is? Follow the subsequent part to increase your knowledge. On the other hand, if you are a Pro, head toward the process section right away.

What is Bootloader?

The bootloader is a set of commands that execute whenever you turn ON your smartphone. Usually, the operating system requires the bootloader to smoothly run the boot process while operating the recovery mode.

Besides this, every android smartphone brand has its unique bootloader design, but they all work similarly. Although, the location of the boot files is varied depending on the brand.

Now, the question is why there’s a bootloader on your smartphone in the first place. Well because the smartphone makers want to use their user interface skin and don’t apply any changes. However, the Android ecosystem is an open-source platform.

Therefore, Android provides an alternate routine to unlock endless customization. You can start with unlocking the bootloader, Root Samsung Galaxy A02, and finally, flash amazing ROMs.

How to Unlock bootloader on Samsung Galaxy A02?

Unlocking the bootloader is a tiresome task if you are doing it for the first time because you have to track several things in the upcoming process. We have covered everything you need to know to get started so buckle it up!


  1. First and foremost, you need to make sure that your phone is charged more than 70% to smoothly run the upcoming process.
  2. A computer setup or laptop is necessary so that you can effortlessly run commands in the download mode without much difficulty.
  3. Following this, get a USB cable to connect your Samsung Galaxy A02 to the computer.
  4. Last but not the least, take a complete backup to save your important data being deleted.

Note: Unlocking the bootloader of the Samsung Galaxy A02 will cost you permanent data loss. Avoid this situation by ensuring that you have a backup of your essential data on physical hardware or cloud storage.

Unlock bootloader on Samsung Galaxy A02 by download mode

Before getting started, access the developer mode and enable a few settings; here are the following steps.

  • Head toward the Settings App.
  • Scroll down and tap on Software Update.
  • Tap on the Build Number a few times.
  • A message will pop up You are now a developer.
  • Open the Developer Mode and allow OEM unlocking.

Now that you have completed the above section instructions, let’s move to the second half of the process.

Step 1: I’m assuming that you have already unlocked OEM from the developer mode. Now, Turn OFF your smartphone.

Step 2: You will need a USB Cable to interlink your computer/laptop to your device. Connect both of the ends properly.

Step 3: Next, you have to long-press the Power button until the Samsung logo doesn’t appear on the screen.

Step 4: Simultaneously, press and hold Volume Up and Down once the logo appears, and then release both buttons when the Warning sign seems.

Step 5: Once you have entered the download mode or the recovery options, press and hold Volume Up to access the Bootloader menu.

Step 6: Continue by pressing Volume Up to confirm unlocking the bootloader process.

Step 7: A prompt will appear on the screen, which warns that your data will be permanently deleted. Confirm to Continue.

Step 8: It will take some time to reboot the entire system, so wait till then.

Finally, you have completed the guide to unlocking the bootloader on Samsung Galaxy A02. Now, you can dive into the rooting process so that you can unleash your phone’s true potential without any hassle.

Advantages of  Unlock bootloader

Unlocking the bootloader is the first setup to receive immersive rooting privileges. Looking at the positive side, you can perform several things that usually are not possible with a regular phone. Such as, you can attain root access, and flashing various custom ROMs also becomes easier.

On top of that, you can optimize your smartphone performance according to your desire, while adjusting the system settings to modify the interface. Besides this, it will open new doors to enhance the overall experience of customization.

Disadvantages of Unlock bootloader

Once you have unlocked the bootloader, you will lose all of the features you’re guaranteed in the warranty policy. Though, it might doesn’t matter if your device has already crossed the warranty period. Yet, there’s a slight chance that the phone’s performance got affected, and you also lose your important data if you don’t take any backup.

Moreover, you are compromising with the security factors too. But in the worst-case scenario, if you don’t follow the above-mentioned process, it could even brick your device. Definitely, you don’t want it to happen in the first place. Therefore, follow the guide precisely.


Brillant! You have grasped information from the above-mentioned guide. With this, you can move one step ahead and unlock the impressive custom features of your Samsung Galaxy A02. Meanwhile, do let us know about your experience in the following section.