Once resolved, you’ll never want to see this error again. Implement these best practices:
import serial, time
simultaneously while plugging in the USB cable to a powered-off device. Check Drivers : Use a reliable driver like the filter or official MediaTek USB VCOM
The handshaking process involves a series of steps: handshaking... error unexpected response 0x68
Hold the physical + Volume Down buttons simultaneously on your device, then plug it into your computer's USB port.
Hold both and Volume Down buttons simultaneously, then plug in the USB cable.
: Returning 0x68 typically implies that the device controller processed the pulse but returned a "busy," "unsupported command," or "hardware timeout" error. This means the computer can see the physical COM port connection, but the software cannot establish the logical data pipeline required to inject a download agent or bypass security. Primary Root Causes Once resolved, you’ll never want to see this error again
If you're encountering the "Handshaking... Error Unexpected Response 0x68" error, here are some troubleshooting steps and potential solutions:
The "handshaking... error unexpected response 0x68" error can stem from a variety of issues related to SSL/TLS configuration, network problems, or software bugs. Systematic troubleshooting, focusing on the SSL/TLS handshake process and the configurations of both the client and server, is necessary to resolve the issue.
The error message typically indicates a communication failure where a device or software receives an unrecognized data byte ( 0x68 ) during an initial connection phase. This error is most commonly associated with database connections , embedded device programming , or SSL/TLS negotiations . Potential Causes and Contexts Hold both and Volume Down buttons simultaneously, then
A TLS handshake can fail for many reasons, such as protocol version mismatches (e.g., client only supports TLS 1.2, but server requires TLS 1.3) or cipher suite incompatibilities. Improper implementation of extensions like ALPN (Application-Layer Protocol Negotiation) can also cause failures. For STARTTLS (used in email), "picky servers" may reject a full data burst, requiring a more nuanced negotiation.
If the phone turns on or gets stuck on a charging animation, hold the button down for 10 to 15 seconds to force a hard reset, then immediately retry the key combination. 2. Reinstall and Filter Your USB Drivers
The device restarted into regular charging or preloader mode instead of staying in a stable download mode.