Handshaking... Error Unexpected Response 0x68

Modern AMD and Intel USB 3.0/3.1 ports often break legacy MediaTek handshake protocols. If your PC only has USB 3.0 ports, use a USB 2.0 legacy hub between the PC and the phone to intentionally step down the connection speed.

To resolve this error, the following steps should be taken in order:

Standard RS-232 uses +12V for logic 0 (space) and -12V for logic 1 (mark). TTL serial (common on Arduino, ESP32) uses 0V for logic 0 and 3.3V/5V for logic 1 . handshaking... error unexpected response 0x68

Comprehensive Guide to Fixing the "Handshaking... Error Unexpected Response 0x68"

Several factors can lead to the "handshaking error: unexpected response 0x68": Modern AMD and Intel USB 3

Manually select an alternate, matching device model profile from the program's dropdown menu to load a compatible DA file.

If using automated utilities like UnlockTool, look under the configuration options and uncheck . TTL serial (common on Arduino, ESP32) uses 0V

0x68 0x65 0x6C 0x6C 0x6F 0x68 0x65 0x6C 0x6C 0x6F 0x68 0x65 0x6C 0x6C 0x6F

: The 0x68 error is a frequent "pain point" in user forums, often requiring users to physically "test point" the device (shorting pins) to force the correct handshake response.

Does this error occur specifically while you are trying to or while unbricking a device ? Solved: Hardware handshaking causing a serial comm issue?