Flash firmware on BlackZone K20
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How to flash BlackZone K20?
Why reinstall the firmware?
Errors start to appear in the operating system.
Some applications stop opening.
Many programs from the Play Market do not start.
The phone turns off for no apparent reason.
The phone slows down a lot during operation.
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 specialized services on which developers lay out 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 an SD card into the gadget. It must have enough memory for the firmware.
Find information about your smartphone model.
Fully charge your device's battery.
Download the archive with Firmware and place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App to your phone from the Play Market. And install this app.
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.
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.
When the file is loaded, return to the main screen of the Official TWRP App and press 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'.
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.
Write the firmware and other necessary files to the SD 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. 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, 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.
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. Press the 'OK' button.
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.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Smart Phone OS: Android v7.0 (Nougat); CPU: Quad core, 1.5 GHz; RAM: 2 GB; Internal Memory: 16 GB; External memory: Up to 32 GB; Colours: Blue, Green; Screen Size: 5.5 inches (13.97 cm); Screen Resolution: 720 x 1520 pixels; Screen Type: IPS LCD; Pixel Density: 306 ppi; Touch Screen: Capacitive Touchscreen, Multi-touch; Camera: 5 MP Primary Camera; Flash: LED Flash; Image Resolution: 2592 x 1944 Pixels; Features: Digital Zoom; Camera: 5 MP Primary Camera; Flash: LED Flash; Network: 4G: Available ,3G: Available, 2G: Available; SIM 2: 2G Bands: GSM 1800 / 1900 / 850 / 900 MHzGPRS: Available; Bluetooth: yes; GPS: with A-GPS; VoLTE: yes; Wi-Fi: Wi-Fi 802.11, b/g/n; Wi-Fi ...
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