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Flash firmware on Coolpad Cool 20 plus

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How to flash Coolpad Cool 20 plus?


Why reinstall the firmware?

Errors in the Android OS start to appear regularly.

Some installed applications stop opening.

Some programs from the Play Market do not start.

The phone restarts by itself for no reason.

The phone slows down a lot during operation.

You want to update the firmware, as it does not suit you in terms of functionality.





Where can I find the firmware?

On the phone manufacturer's website.

On sites where third-party developers and phone manufacturers post custom or official OS.


What should be done before installing the firmware?

Create a backup copy of user data and transfer it to your computer.

Insert an SD card into the gadget. It must have enough memory for the firmware.

Find information about your smartphone model.

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

Find and download the archive with Firmware. Place it on the SD card.





Installing TWRP Recovery

Install the Official TWRP App from the Play Store on your phone. And run this application.

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 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.

After downloading the image file, go 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.

Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.

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.

Copy the firmware and other necessary files to the SD card.

Insert a SD memory card into the 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

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.

Now 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 the files were copied. Press the OK button.



TWRP

Select the firmware file 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, 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, CoolOS 2; Chipset: Mediatek MT6769 Helio G85 (12nm); CPU: Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55); GPU: Mali-G52 MC3; Type: IPS LCD; Screen Size: 6.52 inches, 102.6 cm 2 (~82.5% screen-to-body ratio); Resolution: 720 x 1600 pixels, 20:9 ratio (~269 ppi density); Card slot: microSDXC; Internal: 128GB 4GB RAM; Dual: 48 MP, f/1.8 (wide), 1/2", PDAF 0.3 MP; Features: LED flash, panorama, HDR; Video: 1080p@30fps; Single camera: 5 MP; Video: Yes; Loudspeaker: Yes; 3.5mm jack: Yes; Sensors: Accelerometer, proximity, compass; Type: Li-Po 4500 mAh, non-removable; Charging: 10W wired; Dimensions: 164.3 x 75.7 x 8.7 mm (6.47 x 2.98 x 0.34 in); Weight: 197.1 g (6.95 oz); ...

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