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Flash firmware on Samsung Galaxy A03 Core

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How to flash Samsung Galaxy A03 Core?


Why reinstall the firmware?

The operating system keeps getting errors.

Some applications stop opening.

Many programs from the Play Market do not work.

The phone restarts or shuts down for no reason.

The phone is slow.

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 developers 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 an SD card into your phone to write the firmware to it.

Determine your smartphone model.

Fully charge your device's battery.

Download archive with Firmware. Place it on the SD card.





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 consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press 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, 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 that you are ready to start the procedure - press 'OK' in the question window.

After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..

Write the firmware to the SD 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 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 clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. You will delete all user data from the phone, this will avoid software errors and other problems.

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

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 writing files to the phone's memory will begin, this is 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 11; Chipset: Unisoc SC9863A (28nm); CPU: Octa-core (4x1.6 GHz Cortex-A55 & 4x1.2 GHz Cortex-A55); GPU: IMG8322; Type: PLS TFT; Screen Size: 6.5 inches, 102.0 cm 2 (~81.8% screen-to-body ratio); Resolution: 720 x 1600 pixels, 20:9 ratio (~270 ppi density); Card slot: microSDXC; Internal: 32GB 2GB RAM; Single camera: 8 MP, f/2.0, AF; Features: LED flash; Video: 1080p@30fps; Single camera: 5 MP, f/2.2; Loudspeaker: Yes; 3.5mm jack: Yes; Sensors: Accelerometer, proximity; Type: Li-Ion 5000 mAh, non-removable; Dimensions: 164.2 x 75.9 x 9.1 mm (6.46 x 2.99 x 0.36 in); Weight: 211 g (7.44 oz); Build: Plastic back, plastic frame; SIM: Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual s ...

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Samsung Galaxy A03 Core