How To Unlock Samsung Galaxy A21 Bootloader?

Hey Galaxy Users!

Welcome to another unlocking device guide. This article is going to be about how you can unlock Samsung Galaxy A21 Bootloader.

Unlocking Bootloader is risky for device and device data.  We’ll not responsible for any kind of loss. Do at your own risk.

Not only the unlocking device, but we’ll also cover how many benefits you can take once the device is unlocked.

Bootloader unlocking is always an important part of installing TWRP Recovery and Rooting Galaxy devices. You can’t install any Custom ROM and third-party recovery with unlocking the device.

In short, we can say that without unlocking the bootloader no one is allowed to edit the android OS.

Take a cup of coffee, because this article is going to be in-depth. We’re as crystal clear, after reading, you can easily unlock the Samsung Galaxy Device bootloader and will do all mention things above. Are you excited to know?

Whether you’re going to unlock the device bootloader. But actually, you don’t what is the android bootloader & why the manufacturer by default locks. So let’s start exploring.

What Is Android Bootloader?

The bootloader is a program that starts when the device’s power is on to activate the operating system. In other words, an unlock the bootloader is key to making your device a super android device. Make sense! Here’s the simple wording. Without unlocking the bootloader, you can’t root your device and can’t install any Custom ROM.

By rooting you can make the Galaxy A21 device into a super device. That’s we’re saying this is key for you if you want to experience next-level things.

Benefits Of Unlock Galaxy A21 Bootloader

Once you unlock the Galaxy A21 bootloader, then you’ll eligible to do the below-mentioned things.

After unlocking you can Install TWRP Recovery and Root Galaxy A21 device, that’s mean you can customize more than your imagination.

Next, you can install custom ROM On Galaxy A21 which requires Root access to your device. And you know you can Take backup to install third-party ROM once you install TWRP On the Galaxy A21 device.

You’ll also be eligible to install any modified applications without any system warning. Indirectly we can say that bootloader is key to changing devices according to users’ needs.

Disadvantages Of Unlock Galaxy A21 Bootloader

This section will compel you to think before unlocking the device.

Unlocking the bootloader will wipe all data. Keep the backup of data for security.

Android OS will no longer be secure after the bootloader unlock. Your device will not warn you while installing the third-party application. This is the biggest drawback.

Another drawback is the system warranty is a loss. And last but not least device data will be lost. Keep it in mind you can’t retrieve data if you don’t have a backup.

Download the latest Samsung USB drive with the help of the twrp update.

We hope the above mention terms will know in your mind before unlocking the bootloader.

Guide To Unlock Samsung Galaxy A21 Bootloader

Here’s the step-by-step method to unlock the device. But before that make sure you know the pre-requirements.

Let’s start –

Pre-Requirements Before Unlocking

First Enable the developer option and unlock OEM. Next, make sure you have a PC/Laptop and C-Type USB Cable to connect the device with the PC. And rest follow the steps below mention.

Steps To Unlock Galaxy Bootloader

  • First, Download the depth test application
  • Open the application and click on Query Application Status Request submission
  • Open the Query Application Status
  • Once the Review successful shows on-screen then tap on start in-depth test
  • After doing this device will enter into the fastboot mode
  • Next, connect the Galaxy device with PC/Laptop
  • Now download and install fastboot into your PC
  • After installing fastboot move the folder named “platform-tools” to the desktop
  • Open the platform-tools folder and then Right click + Shift after that select open command window here
  • Type “fastboot flashing unlock” in the cmd window
  • Press the volume button to unlock the device bootloader

Congrats! You successfully unlock the galaxy device bootloader.

Check out a universal guide to install twrp recovery on any android device.

Reason – Why The Galaxy A21 Bootloader Locked

Many Samsung Galaxy users want to know the reason. Why the bootloader is locked by default. Here’s the answer,  For security reasons bootloader is locked.

Due to this no one can edit system files or can’t edit android OS. which gives a secure environment to the android device.

In this safe environment, your data is safe. Other facts about the locked bootloader are already clear in the disadvantages section.

Take a look at the above section again.

Hope this helps you. It’s too good if you already unlocked your Galaxy device.

Still have an issue, check out a similar guide to unlock galaxy A51 bootloader in simple steps.


This article is all about the process of unlocking the device bootloader. Every Galaxy A21 User can easily unlock their device.

In case the user is confused or not able to make the decision about unlocking the device then by reading the pros and cons, the user can make his mind.

Despite that you can any query, let us know in the comment section. Our team will solve your query as soon as possible.

Related Articles

In case you need more information about, TWRP, Root, Recovery, and bootloader. Then you can check out the below-recommended guides. [DCRP_shortcode style="1" image="0" excerpt="0" date="0" postsperpage="5" columns="1"]

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top