Flash firmware on Blackview A20 Pro
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How to flash Blackview A20 Pro?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some applications do not open, reinstalling which does not lead to a positive result.
Many programs from the Play Market do not work.
The phone restarts by itself for no reason.
The phone began to work slowly.
You have decided to try a different version of Android.
Where can I find the firmware?
On the website of your 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 and transfer it to your computer.
Insert SD card. An SD card is needed to write firmware to it.
Find out the exact model of your smartphone.
Fully charge your device.
Download 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.
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, you need to select the 'TWRP FLASH' item and give the application root-rights.
On the main screen of the application, click on the 'Select Device' drop-down list, and select your phone model.
After selecting a phone, the application will direct the user to a web page to download the modified recovery environment image file. Download the proposed *.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.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
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 SD memory card into the phone.
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. Open the menu and select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button.
Firmware via TWRP
Before flashing, you need to delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.
Press the 'Install' button to start the flashing.
The file selection screen is displayed. At the very top is the 'Storage' button, which allows you to switch between types of memory.
Select the storage to which the files were copied.
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 flashing the phone will begin, accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Operating system: Android v8.1 (Oreo); Sim slots: Dual SIM, GSM GSM; Sim size: SIM1: Nano SIM2: Nano; Network: 4G: Available 3G: Available, 2G: Available; Fingerprint sensor: Yes; Display type: IPS LCD; Aspect ratio: 18: 9; Screen to body ratio: 75.27 %; Pixel density: 293 ppi; Screen size: 5.5 inches (13.97 cm); Screen resolution: 720 x 1440 pixels; Touch screen: Yes Capacitive Touchscreen, Multi-touch; Loudspeaker: Yes; Audio jack: 3.5 mm; Settings: Exposure compensation; Camera features: Digital Zoom, Auto Flash, Face detection, Touch to focus; Image resolution: 3264 x 2448 Pixels; Autofocus: Yes; Shooting modes: Continuos Shooting, High Dynamic Range mode (HDR); R ...
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