PREREQUISITES:

Get the Required Files:

Get your Vivo X21’s official firmware. Usually, the official Vivo website or other reliable sources will have this information.
Install the relevant flashing tool after downloading it. The “SP Flash Tool” and other manufacturer-provided tools are frequently used with Vivo devices.

Set up USB drivers:

Make sure your computer has the required USB drivers for your Vivo X21 installed.

Steps to Flash Vivo X21 Firmware:

Firmware file extraction:

After downloading the firmware file, extract it. This ought to produce a folder with the files required for flashing.
Set up the Flashing Tool:

Install the flashing utility on your PC after downloading it. For instance, be careful to install the SP Flash Tool appropriately if you’re using it.
Enter Download/Flash Mode at bootup:

Turn your Vivo X21 off.
To switch between Download and Flash mode, press and hold the designated key combination. For advice, consult your device’s manual or internet resources as the combination may be unique to your device.
Link Your Device:

Use a USB cord to connect your Vivo X21 to the computer.

Flash Tool Firmware Loading:

Get your computer’s flashing tool open.
Open the flashing tool and load the firmware files. Depending on the tool, this often entails choosing the scatter file or something like.

Get the flashing started.

Start the flashing procedure as soon as the firmware has been loaded. This might entail selecting a “Start” or “Download” button inside the flashing tool.
Firmware file extraction:

After downloading the firmware file, extract it. This ought to produce a folder with the files required for flashing.
Set up the Flashing Tool:

Install the flashing utility on your PC after downloading it. For instance, be careful to install the SP Flash Tool appropriately if you’re using it.
Enter Download/Flash Mode at bootup:

Turn your Vivo X21 off.
To switch between Download and Flash mode, press and hold the designated key combination. For advice, consult your device’s manual or internet resources as the combination may be unique to your device.

Link Your Device:

Use a USB cord to connect your Vivo X21 to the computer.
Flash Tool Firmware Loading:

Get your computer’s flashing tool open.
Open the flashing tool and load the firmware files. Depending on the tool, this often entails choosing the scatter file or something like.
Launch the

Procedure:

Await the Finish:

Let the flashing procedure finish. You should see progress indications on the tool, although this might take some time.
Unplug and restart:

After the flashing is finished, unplug your Vivo X21 from the PC.
Turn on your gadget and see whether anything has changed or improved.

Important Notes:

To prevent any problems, always use official and reliable firmware files and tools.
Make sure the firmware version you are flashing is compatible with your device.
Use cautious as this procedure may cancel your warranty.

Because the flashing procedure might cause data loss, be careful to backup all of your vital data before moving on.
To prevent disruptions, make sure your Vivo X21 has enough battery life or plug it in to a charger while the procedure is underway.

Keep take mind that these guidelines are based on standard procedures for flashing Vivo devices. Depending on the firmware and version you’re running, the precise procedures may change significantly. Therefore, we cannot be held accountable for these directives. Always consult your device’s and tools’ official manuals and resources.