Flash firmware on Samsung Galaxy A21s
Mobiles >> Samsung >> Samsung Galaxy A21s| Specifications | Reviews | Secret codes |
| Unlock phone | Root phone | Bypass FRP |
| Backup | Flash Firmware | Screenshot |
| Hard Reset |
How to flash Samsung Galaxy A21s?
Why reinstall the firmware?
Errors start to appear in the operating system.
Some applications stop opening.
Many applications from the Play Market do not start.
The phone turns off for no apparent reason.
The phone is slow.
The OS does not match the system requirements of the smartphone.
Where can I find the firmware?
On the official website of the manufacturer.
On Internet resources where users post custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to your computer.
Insert your SD card into your phone. It must have enough memory to fit the firmware.
Find information about your smartphone model.
Fully charge your device's battery.
Download archive with Firmware.
Installing TWRP Recovery
Install the Official TWRP App via the Play Market. And run this 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.
On the main screen of the application, select '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. Then we tell the program the path where the file loaded in the previous step is located.
Now press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered 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 use a special item in the Official TWRP App menu, accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. We open the menu, select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically.
Firmware via 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.
Now you can start flashing. Click the 'Install' button.
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 you copied the files.
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 damaged files during recording.
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.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Operating system: Android 10, One UI 2.0; Processor: Octa-core (4x2.0 GHz Cortex-A55 & 4x2.0 GHz Cortex-A55); Chipset: Exynos 850 (8nm); GPU: Mali-G52; Internal memory: 32GB 3GB RAM, 64GB 4GB RAM, 64GB 6GB RAM; External memory: microSDXC (dedicated slot); Type: PLS TFT capacitive touchscreen, 16M colors; Size: 6.5 inches, 102.0 cm 2; Resolution: 720 x 1600 pixels, 20:9 ratio; SIM: Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by); Dimensions: 163.7 x 75.3 x 8.9 mm (6.44 x 2.96 x 0.35 in); Weight: 192 g (6.77 oz); Colors: Black, White, Blue, Red; 2G Network: GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only); 3G Network: HSDPA 850 / 900 / 1900 / 2100; 4G Network: 1, ...
Comments, questions and answers on the flash firmware Samsung Galaxy A21s
Ask a question about Samsung Galaxy A21s
