Root Samsung Galaxy A42 5G using Magisk [No TWRP Required]

Hello, there are you looking for a method to root your Samsung Galaxy A42 smartphone? If yes, then you landed in the right place. In this step-by-step guide, I have covered all the required steps to Root this android device.

We have divided this guide into six sections. The first section covers Unlocking the bootloader on Samsung Galaxy A42, the second section covers downloading the firmware, third preparation of patched boot image file, fourth patching of the boot image file with magisk app, fifth booting the device into download mode, and the last step flashing the patched boot file using Odin tool to attain root access.

So, this was a quick overview of this guide. Before performing any steps, we highly recommend you take a complete backup of your android device. If anything goes wrong during the rooting process, you will be able to restore your stock OS back if you have a backup.

Steps to Root Samsung Galaxy A42 5G

Below I have shown step by step procedure to Root Samsung Galaxy A42 5G. Make sure to follow every step carefully, or else you may face trouble booting up your device again.

Please read the complete guide before applying the steps. This will avoid confusion.

Things to remember

• Make sure to disable all security Locks on your Samsung Galaxy A42.
• Take Full Backup of your Android device.
• You need a PC to perform the Commands.
• Fully charge your phone.
• Samsung Galaxy A42 Original USB Cable.

Note: Rooting is a complex process, so if you miss any of the below steps will end up bricking your device. So, make sure to follow all the steps carefully as shown.

We are not responsible for any loss and damage to your device. Apply the below steps with your own risk.

Step 1: Unlock Bootloader on Samsung Galaxy A42

1. First, we need to enable Developer Options on Samsung Galaxy A42.
   • Go to “Settings” on your Samsung Galaxy A42.
   • Scroll down to the very bottom of the screen and select “About phone.”
   • Next, select “Software information.”
   • Tap on the “Build number” 5-6 times.
   • Enter your phone’s lock screen PIN/Password/Pattern if prompted.
   • You will now see the "Developer mode has been enabled!" toast message on the screen.
2. The next thing we need to enable is the OEM unlocking option on Samsung Galaxy A42.
   • Again head over to Settings → Developer options → toggle ON the OEM unlocking option.
   • Next select “Enable” when prompted to confirm.
3. Now we are ready to Unlock the Bootloader on your Samsung Galaxy A42.
   • First, power off your Samsung Galaxy A42 smartphone.
   • Connect your phone to the PC while holding the Volume Down + Power keys together until you see the bootloader screen.
   • Now press Volume Up key to enter “Device unlock mode.”
   • Again press Volume Up key to confirm Bootloader Unlocking on Samsung Galaxy A42.
   • Your device Bootloader is unlocked, and it should reboot automatically.

Downloads

In any steps, if the particular file is asked you to download, then you can come here and download it. We will update the links according to the latest build by developers.

• Download Magisk App (Latest Version) [Phone]
• Samsung USB Drivers (Optional) – Download [PC]
• Odin Flash Tool (Latest) – Download [PC]
• 7Zip-ZS (Latest) – Download [Install it]
• LZ4 – Download [PC] [Extract the Zip file]

Step 2: Download Stock Firmware for Samsung Galaxy A42

You can download Samsung stock firmware from various sources, but the huge problem is the Speed. By using the Frija tool, you can download stock firmware files at high speed.

1. Download Latest Frija Tool.
2. Extract the zip file to your windows desktop.
3. Open the extracted folder and double-click on the frija.exe file to launch the tool.
4. We need two things, first your phone’s model number and second, and CSC/regional code.
   • You can get your phone model number by going to Settings → About phone.
   • To view the CSC code, you can download the “Phone Info SAM“ app.
5. Once you have the above information, enter the required data in the Frija tool.
6. Finally, click on the Download button.

Step 3: Preparing Patched Boot Image file

1. Extract the downloaded firmware package on your PC.
2. Open the extracted folder. You will see five firmware files in .tar.md5 format.
3. Right-click on the AP firmware file, hover into the 7-Zip option, and select Extract files.
4. Now you will find several files along with the boot.img.lz4, vbmeta.img.lz4, and recovery.img.lz4.
5. Copy boot.img.lz4, vbmeta.img.lz4And recovery.img.lz4 to LZ4 Installed folder.
6. Next we have to convert .img.lz4 to .img file. To do that, follow the below steps:
   • Open the lz4 folder.
   • Drag the .lz4 file to the lz4.exe program.
   • The script will convert the file to .img format.
   • You have to convert all three files one by one.
7. Connect Samsung Galaxy A42 device to your PC/Laptop.
8. Now copy the “AP” file from the Firmware folder to your phone’s internal storage.
9. Now the next step you have to follow on your phone.

Step 4: Patch the AP Firmware File with Magisk App

1. Download and install Magisk App on your phone.
2. Open the Magisk app from the app drawer.
3. Tap on the “INSTALL” button.
4. Now here, tap on the “Select and Patch a File.”
5. Navigate to the internal storage and select the AP firmware file that you previously copied to the phone.
6. Once the file is selected, tap on “LET’S GO.”
7. Wait until Magisk patches the file.
8. The patched boot image file can be found in the “Downloads folder.”
9. Now connect your phone to the PC and copy the magisk_patched.tar file to the “firmware folder” on your PC.
10. Extract magisk_patched.tar file.
11. Now head over to the “LZ4 folder” and copy vbmeta.img and recovery.img file to Magisk Patched folder.
12. Select boot.img, vbmeta.img and recovery.img file, right-click on the files, and  “Add to archive.”
13. Select the Archive format to tar and tap on ok.
14. Now you will see the boot.tar Odin flashable file.

Proceed to the next step.

Step 5: Boot your Samsung Galaxy A42 into Download Mode

1. First, power off your Samsung Galaxy A42 device.
2. Connect your smartphone to your PC while holding the Volume Down + Power keys together.
3. You will now see the Bootloader screen.
4. Now press Volume Up key to enter Download Mode.

Step 6: Flash Patched Boot.tar using Odin flash tool

1. First, extract the Odin zip file to your desktop.
2. Open the extracted folder and run Odin3 xxx.exe file.
3. Connect your Galaxy device to a PC/Laptop.
4. You will see ID:COM section light up blue. It means the PC successfully recognizes your phone.
5. Click on the following slot buttons and select the corresponding firmware files:
   • Tip: For BL, CP, CSC, you have to select files from the “firmware folder.” For AP, you have to select the patched boot.tar file (Check Step 6, 14th step.) 
   • BL: Select the firmware file starting “BL.”
   • AP: Select the Patched AP firmware file (boot.tar)
   • CP: Select the firmware file starting “CP.”
   • CSC: Select the firmware file starting “HOME_CSC.”
6. Once all firmware files are loaded to the Odin tool.
7. Make sure to untick the Auto Reboot option under the “Options” tab.
8. Once done, finally, click “Start” to begin the flashing process.
9. If the flashing is successful, you should see the PASS message on the Odin screen.
10. Once the process completes, press the Volume Down + Power keys to exit Download mode.
11. As soon as the screen goes black, press the Volume Up + Volume Down + Power keys to boot into Recovery mode.
12. Now once the Galaxy A51 boots into stock recovery mode, follow the below steps.
    • Go to Wipe data/factory reset. (Use Volume keys to navigate between the options and Power key to select an option.)
    • Select “Factory data reset.”
    • Once done, select “Reboot system now.”
13. The first boot will take some time.
14. That’s it! You have successfully rooted Samsung Galaxy A42 using Magisk.

You can also verify if your rooted Samsung Galaxy A42 passes SafetyNet by pressing the “Check SafetyNet” button in Magisk App.

After your device boots up, you will see Magisk App installed on your phone. This app will help you to manage Root permissions, install Magisk Modules, Magisk Hide, and other features.

If you can’t see the app, download it from here.

Wrapping Up –

I have tried to make this rooting tutorial as simple as possbile, but due to high security, we have to apply additional steps to root this smartphone.

However, if you follow all the steps carefully, then I am sure you will not get any issues while applying the shown steps.

By reading the above article, Have you rooted your Samsung Galaxy A42 5G smartphone? If yes, then definitely give your valuable suggestion in the comments below.