The standard MTK VCOM Driver often does not support the raw data transfer required by bypass tools. Replacing it with libusb-win32 via Zadig is the industry standard fix.
Ensure you are using the latest version of the MTK Bypass Tool. mtk bypass tool handshaking error fix
By following these guidelines and troubleshooting steps, you should be able to fix the handshaking error and successfully bypass FRP on your MTK device. The standard MTK VCOM Driver often does not