Flash firmware on Blackview BV4900S
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How to flash Blackview BV4900S?
Why reinstall the firmware?
Errors begin to 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 for no reason.
The phone began to work slowly.
You are not satisfied with the functionality of the stock firmware.
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?
Back up your phone's user data.
Insert your SD card into your phone. It must have enough memory to fit the firmware.
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
Download the Official TWRP App from the Play Market. And install it.
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, the 'Select Device' drop-down list is available, in which you need to find and select the device model for installing the recovery.
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 memory card into the phone.
To reboot in recovery, it is convenient 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 tap 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.
Everything is ready to start flashing. Press the 'Install' button.
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 writing files to the phone's memory will begin, accompanied by logging and filling in the progress bar.
The completion of the installation procedure is indicated by the inscription 'Successful'.
Summary: OS: Android 11 Go; Processor: Unisoc SC9863A; Processor clock: 1.60 GHz; Number of cores: 8; GPU: IMG8322; RAM: 2 GB; Internal memory: 32 GB; DualSIM: yes; Display: Color / IPS TFT; 16M colors; 720 x 1440 px (5.70") 282 ppi; 68.2% screen-to-body ratio; Display protection: Asahi Dragontrail; Type: Standard; Photo matrix: 8 Mpx; Resolution: 3264x2448 px; Flash: yes LED; Digital zoom: yes; Video formats: H.264, MPEG4; Additional: AF; Type: Portrait; Photo matrix: 5 Mpx; Flash: yes; Digital zoom: yes; Additional: FF; A-GPS: yes; GPS module: yes; Bluetooth: yes v4.2; EDGE: yes; GPRS: yes; Galileo: yes; GLONASS: yes; Beidou: yes; IrDA: yes; NFC: yes; USB: yes v2.0 OTG; WAP: yes v2.0; WiFi: yes v8 ...
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