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Flash firmware on Samsung Galaxy S20 Dual SIM

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How to flash Samsung Galaxy S20 Dual SIM?


Why reinstall the firmware?

Errors constantly appear in the Android OS.

Some installed applications stop opening.

Many applications from the Play Market do not start.

The phone restarts or shuts down for no reason.

The phone started to work slowly.

You are not satisfied with the possibilities of the stock firmware.





Where can I find the firmware?

On the official website of the phone manufacturer.

On Internet resources where users post custom or official OS.


What should be done before installing the firmware?

Create a backup copy of user data and transfer it to another medium.

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

Determine your smartphone model.

Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.

Download archive with Firmware.





Installing TWRP Recovery

Download the Official TWRP App from the Play Market. Download, install and launch the application..

When you start the application for the first time, you must agree to install the firmware, as well as agree to grant the application Superuser rights and click the 'OK' button.

On the next screen, select 'TWRP FLASH' and give the application root rights.

TWRP

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

After selecting a device, the program redirects the user to a web page to download the corresponding image file of the modified recovery environment. Download the suggested *.img file.

After downloading the image file, return 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 that you are ready to start the procedure - press 'OK' in the question window.

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

Copy the necessary files to the SD memory card. Using a PC or laptop card reader.

Insert a memory card into the device.

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 'Reboot' and then click on the 'REBOOT RECOVERY' button.





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 appears. At the very top is the 'Storage' button, select the location where the firmware file is located.

Select the location where you copied the files.



TWRP

Find the file we need and click on it. A screen opens with a warning about possible negative consequences, as well as the item 'Zip signature verification'. This item should be checked by placing a cross in the check-box, which will avoid using damaged 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.

After the firmware installation procedure is completed, the 'Successful' message appears on the screen.





Summary: OS: Android 10; Processor: Samsung Exynos 990; Processor clock: 2.70 GHz; Number of cores: 8; GPU: ARM Mali-G77 MP11; RAM: 8 GB; Internal memory: 128 GB; Interface: One UI 2.0; Memory cards: yes; microSD, microSDHC, microSDXC (up to 1 TB); Display: Color / Dynamic AMOLED; 16M colors, 120 Hz; 1440 x 3200 px (6.70") 524 ppi; 90.8% screen-to-body ratio; Display protection: Corning Gorilla Glass 6; Type: Standard; Photo matrix: 12 Mpx; Sensor size: 1/1,76; Flash: yes LED; Digital zoom: 30x; Hybrid zoom: 3x; Focal length: 26 mm; Video formats: H.264, H.265, MPEG4 - 24 fps; Video resolution: 7680x4320; Additional: AF, OIS, f/1.8; Type: Portrait; Photo matrix: 10 Mpx; Flash: yes; Digital zoom: yes ...

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Samsung Galaxy S20 Dual SIM