Click the green button located at the top left of the interface.
Extract the downloaded to an accessible folder on your desktop. Extract the SP Flash Tool package. Install the MediaTek USB Drivers on your PC. Step 2: Configure SP Flash Tool
Charge your TCL 20B to at least 50% to prevent the phone from powering off mid-flash.
TCL provides continuous security updates for its smartphones to fix vulnerabilities. Check for these monthly. Software Upgrade - TCL
This is the official method and should always be your first choice. Firmware TCL 20B
Click in the tool, then connect your phone to the PC while holding the Volume Down button. Wait for the green checkmark indicating a successful flash. Troubleshooting Common Issues
The easiest and safest method is the system. What is Firmware? - Maple Systems
Temporary disable your computer’s antivirus or Windows Defender, as they sometimes false-flag flashing tools as threats. Required Download Links and Tools
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Release the buttons the moment the SP Flash Tool interface registers the device. You will notice a red bar at the bottom, followed by a yellow progress bar indicating active flashing. Step 5: Finalize and Reboot
These often contain malware or corrupt files.
Once the SP Flash Tool interface opens, locate the tab.
Change your USB cable or use an alternate version of the SP Flash Tool. Ensure your phone is completely turned off before connection. Install the MediaTek USB Drivers on your PC
Windows 10 and 11 often block unsigned MTK VCOM drivers. Restart your PC into "Advanced Startup Options" and choose "Disable Driver Signature Enforcement" before installing the drivers.
Flashing or updating your firmware can solve several problems:
If the flash fails, look closely at the error message or error code in SP Flash Tool. BROM Error: S_AUTH_HANDLE_IS_NOT_READY (1011)