How To Unlock Bootloader on Samsung Galaxy A21? [Easy OEM Unlock]

Here is How To Unlock Bootloader on your Samsung Galaxy A21 or OEM Unlock, all you need to do is follow some simple steps and your phone will be free from the locks.

Samsung Galaxy A21 Specifications

Samsung Galaxy A21 is a Smartphone Powered by Android 10 with OneUI 2.0,16MP (primary) + 8MP (ultra-wide) + 2MP (depth) + 2MP(macro),13MP front camera,Rear Fingerprint sensor, Face Recognition

We will show the difference between a Stock and Custom ROM and help you to choose the best OS for your phone.

Quick Specs

Samsung Galaxy A21
System chip:	Mediatek Helio P35
Processor:	Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
GPU:	PowerVR GE8320
RAM:	3GB LPDDR4
Internal storage:	32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion:	microSDXC up to 512 GB
Device type:	Smartphone
OS:	Android (10), Samsung One UI

Complete Specifications

Why Unlock Bootloader?

Unlocking Bootloader is simply removing the security lock provided by the manufacturer. Manufacturers secure your device by creating a bootloader lock for their smartphones.

After unlocking the bootloader your phone can enter into recovery mode, and without unlocking you can’t boot and flash any custom ROM on the device.

The main reason behind this lock is that users can’t alter their official stock ROM, and stay to the OS provided officially on the phone.

There are some advantages and disadvantages of unlocking the bootloader on your Samsung Galaxy A21. So please read these points given below carefully.

Advantages of Unlocking Bootloader

There are some main advantages of unlocking the bootloader on any Android device. There must be anyone reason you are reading this guide.

Root your phone after Unlocking Bootloader.
You can flash Custom ROMs or Recovery on your smartphone.
More options will be available for customizing the phone
Easily Flash various Software/firmware to your device.

Disadvantages of Unlocking Bootloader

The phone’s Warranty will be lost but you can get it back by unrooting and by completely restoring the stock ROM.
During flashing, files may Brick your phone.
After unlocking the bootloader of your smartphone you may not receive OTA Updates
You may face errors while using some Google Apps such as the Google Play store or YouTube.

Warning: All the tutorials/ guides shown in this blog are not tested for each and every smartphone. As the process of unlocking the bootloader is almost same for any device.

Infofuge.com is not responsible for loss and damage to your smartphone. Try these methods with your own risk!

How To Unlock Bootloader in Samsung Galaxy A21?

Follow some straightforward steps and your phone will be free from any restrictions provided by the manufacturer. We have provided 2 methods in case one method is not working for your device. In case, the required setting for method 1 is not provided on your phone you can always choose the second method, you won’t be stuck anywhere if you are choosing the second one.

Method 1:

This method is straightforward as you won’t require a PC/Laptop to perform the steps. All the steps can be performed within the device itself.

First, backup the Android device completely.
Enable the Developer Options on your Samsung Galaxy A21 device.
Go to the phone Settings menu.
Scroll down to the bottom part and tap on About Phone → tap on Build Number 7 times continuously.
Now, Go back to the main Settings menu again and scroll down.
Tap on the Developer options → to enable the “OEM Unlocking” option.

All done. You have successfully unlocked the bootloader on your Samsung Galaxy A21!

Method 2:

If you cannot see the “OEM Unlock” option on Samsung Galaxy A21, you can follow the below steps.

1. First Setup ADB and Fastboot Drivers on your PC/Laptop. follow the below steps:

Download ADB and Fastboot Tool
Extract It and Run It
Next, Press Y/Yes to install ADB and Fastboot or N/No to skip
Press Y/Yes to install ADB system-wide or N/No for current users only
Again Press Y/Yes to install Drivers or N/No to skip
Continue Driver installation

// Source: xda-developers.com

2. Connect Your Samsung Galaxy A21 to your PC via the original USB Cable.

3. Open the ADB folder. It will be located in this location C:\adb.

4. Now open CMD by typing “cmd” on Address Bar and Hit Enter, as shown in the screenshot below.

5. Once the Command Window is opened, type the following commands.

fastboot devices

Hit Enter, you will see some random string that means your phone is connected successfully to pc. Next type in

fastboot oem unlock

Hit Enter, This command will unlock your Samsung Galaxy A21 Bootloader. Next type

fastboot reboot

This will reboot your phone.

6. Congratulations! You have successfully Unlocked the Bootloader on the Samsung Galaxy Z Fold. I hope this guide helps you to unlock the bootloader on your phone, feel free to comment down below if you have any queries regarding this guide.

Now you can install TWRP Recovery on your Samsung Galaxy A21 (TWRP File May Or May Not Be available as per the development). Furthermore, there is so much more to do after unlocking the bootloader such as rooting and installing custom ROMs on Samsung Galaxy A21.