Flash firmware on Nokia C21
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How to flash Nokia C21?
Why reinstall the firmware?
The operating system keeps getting errors.
Some installed applications stop opening.
Many programs from the Play Market do not work.
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 phone manufacturer.
On sites where third-party developers post custom operating systems.
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 archive with Firmware. Place it on the SD card.
Installing TWRP Recovery
Download and install the Official TWRP App from the Play Market.
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.
On the next screen, select 'TWRP FLASH' and give the application root rights.
On the main screen of the application, click 'Select Device', and find 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 download is finished, you need to return to the main screen of the Official TWRP App and click on 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, press 'OK'.
When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.
Transfer the necessary files to the SD memory 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 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, it is recommended to clear the 'Cache' and 'Data' sections. This will delete all user data from the device, but avoid a wide range of software errors and other problems. You must press 'WIPE' on the main screen.
You can start flashing. Click the 'Install' button.
The file selection screen appears. At the very top is the 'Storage' button, select the location where the firmware file is located.
Select the storage to which the files were copied.
Find the file we need 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 phone's memory will begin, accompanied by logging and filling in 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: IPS LCD; Screen Size: 6.52 inches, 102.6 cm 2 (~77.5% screen-to-body ratio); Resolution: 720 x 1600 pixels, 20:9 ratio (~269 ppi density); Card slot: microSDXC; Internal: 32GB 2GB RAM, 32GB 3GB RAM, 64GB 3GB RAM; Single camera: 8 MP; Features: LED flash, HDR; Video: 720p@30fps; Single camera: 5 MP; Features: LED flash; Video: 720p; Loudspeaker: Yes; 3.5mm jack: Yes; Sensors: Fingerprint, accelerometer, proximity; Type: Li-Ion 3000 mAh, removable; Dimensions: 169.9 x 77.9 x 8.8 mm (6.69 x 3.07 x 0.35 in); Weight: 195 g (6.88 oz); Build: Glass front, aluminum frame ...
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