Flash firmware on Vivo X21
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How to flash Vivo X21?
Why reinstall the firmware?
Errors periodically appear in the Android operating system.
Some installed applications stop opening.
Many programs from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone began to work slowly.
You have decided to try a different version of Android.
Where can I find the firmware?
On the phone manufacturer's website.
On specialized services where users post custom or official OS.
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.
Find out the exact model of your smartphone.
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.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone.
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.
Going to the next screen, select the item 'TWRP FLASH' and provide the application with 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 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 file is loaded, you need to 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.
When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.
Copy the required files to the memory card. Using a PC or laptop card reader.
Insert a memory card into your 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, 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.
Press the 'Install' button to start the flashing.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
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, 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.
After completing the installation procedure, a 'Successful' message appears on the screen.
Summary: Sim Type: GSM+GSM; Dual Sim: Yes; Sim Size: Nano + Nano SIM; Type: Color AMOLED screen; Touchscreen: Yes, with Multitouch; Size: 6 inches, 1080 x 2160 pixels; PPI: ~ 402 PPI; Features: Corning Gorilla Glass v5 Screen Protection; RAM: 6 GB; Internal memory: 64 GB inbuilt; Card Slot: Yes; GPRS: Yes; EDGE: Yes; 3G: Yes; 4G: Yes; VoLTE: Yes (Supports Reliance Jio); Wi-Fi: Yes, with wifi-hotspot; Bluetooth: Yes, v5.0; USB: Yes, microUSB v2.0; GPS: Yes, with A-GPS Support; Fingerprint Sensor: Yes; Sensors: Accelerometer, Gyroscope, Compass, Fingerprint; 3.5mm Headphone Jack: Yes; Camera: Yes, 16 MP with autofocus; Dual Camera: No; Features: Face detection, Touch to focus; ...
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