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Flash firmware on Samsung Galaxy M21 2021

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How to flash Samsung Galaxy M21 2021?


Why reinstall the firmware?

The operating system keeps getting errors.

Some applications stop opening.

Some programs from the Play Market do not start.

The phone restarts or shuts down randomly.

The phone began to work slowly.

You want to update the firmware, as it does not suit you in terms of functionality.





Where can I find the firmware?

On the official website of the manufacturer.

On sites where third-party developers and phone manufacturers post custom or official OS.


What should be done before installing the firmware?

Create a backup copy of user data, contacts and photos and transfer it to your computer.

Insert SD card. An SD card is needed to write firmware to it.

Determine your smartphone model.

Fully charge your device's battery.

Find and download the archive with Firmware. Place it on the SD card.





Installing TWRP Recovery

Install the Official TWRP App from the Play Store on your phone.

When you start the application for the first time, you must agree to install a new firmware and all the risks associated with this, as well as agree to grant the application Superuser rights and click the 'OK' button.

In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.

TWRP

On the main screen of the application, click 'Select Device', and find your phone model.

After selecting the phone, the application will redirect the user to a web page to download the modified recovery environment image file. Download the proposed *.img file.

After downloading the image file, go to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Then we tell the program the path where the file loaded in the previous step is located.

Press the 'FLASH TO RECOVERY' button and confirm your choice.

When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.

Copy the firmware and other necessary files to the SD card.

Insert a memory card into your phone.

To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. Select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically..





Firmware via TWRP

TWRP

Before flashing, you need to delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.

You can start flashing. Click the 'Install' button.


TWRP

The file selection screen is displayed. At the very top is the 'Storage' button, select the location where the firmware file is located.

Select the location where the files were copied. Press the OK button.



TWRP

Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, you need to check the item 'Zip signature verification', which will avoid using corrupted files when writing to the phone's memory sections.

The procedure for flashing the phone will begin, accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.

When the procedure for installing the firmware is completed, the message 'Successful' appears on the screen.





Summary: OS: Android v11; Screen Resolution: 1080 x 2340 Pixels; Screen type: FHD sAMOLED Infinity – U Display; Pixel density: 403 ppi; Touch screen: Yes, Capacitive Touchscreen, Multi-touch; Internal memory: 64 GB; Expandable memory: Yes, Upto 512 GB; Front camera: 20 MP; Front camera: 20 MP f/2.0 Primary Camera; Main camera: 48 MP 8 MP 5 MP; Resolution: 48 MP f/2.0 Primary Camera, 8 MP f/2.2, Wide Angle, Ultra-Wide Angle Camera, 5 MP f/2.2, Depth Camera; Camera setup: Single; Flash: Yes, LED Flash; Image resolution: 8000 x 6000 Pixels; Autofocus: Yes; Shooting modes: Continuos Shooting, High Dynamic Range mode (HDR); Video recording: 1920x1080 @ 30 fps; Sensor: ISOCELL Plus; Settings: Exposure c ...

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Samsung Galaxy M21 2021