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Flash firmware on Samsung Galaxy A12 Exynos 850

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How to flash Samsung Galaxy A12 Exynos 850?


Why reinstall the firmware?

Errors constantly appear in the Android OS.

Some installed applications stop opening.

Many programs from the Play Market do not start.

The phone restarts or shuts down randomly.

The phone slows down a lot during operation.

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





Where can I find the firmware?

On the phone manufacturer's website.

On specialized services on which developers lay out 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 your SD card into your phone. It must have enough memory to fit the firmware.

Determine your smartphone model.

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

Download the archive with Firmware and place it on the SD card.





Installing TWRP Recovery

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

At the first start, you need to give consent to future manipulations, as well as consent to granting the Superuser rights to the application. Check the checkboxes and press the 'OK' button.

Going to 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 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.

When the file is loaded, return to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Select the file downloaded in the previous step.

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

The recording process is very fast, and upon completion, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.

Write the firmware and other necessary files to the SD card. Using a PC or laptop card reader, it will be much faster.

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





Firmware via TWRP

TWRP

Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. This will delete all user data from the device, but avoid a wide range of software errors and other problems.

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


TWRP

The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.

Select the location where you copied the files. 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 writing files to the device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.

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





Summary: Smart Phone OS: Android v11; Custom UI: Samsung One UI; CPU: Octa core (2 GHz, Quad core, Cortex A55 2 GHz, Quad core, Cortex A55); Chipset: Samsung Exynos 8 Octa 850; Architecture: 64 bit; GPU: Mali-G52 MP1; RAM: 4 GB; Screen Size: 6.5 inches (16.51 cm); Screen Resolution: 720 x 1600 pixels; Display Type: PLS TFT LCD; Display dots per inch: 270 ppi; Touch Screen: Yes, Capacitive Touchscreen, Multi-touch; Bezel-less display: Yes with notch; Internal Memory: 64 GB; Expandable Memory: Yes, Up to 1 TB; User Available Storage: Up to 47.6 GB; USB OTG: Yes; SIM Size: SIM1: Nano, SIM2: Nano; SIM Slot(s): Dual SIM, GSM GSM; Network Support: 5G, 4G, 3G, 2G; Bluetooth: Yes, v5.0; GPS: Yes with ...

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