Handshaking Error Unexpected Response 0x68 ◉

The most frequent cause is trying to connect to an encrypted HTTPS port using unencrypted HTTP, or vice versa. If a server expects a TLS client hello handshake but receives a standard plain text HTTP string (like "GET / HTTP/1.1" or "Host:"), it encounters the letter "h" ( 0x68 in hex). The server doesn't know how to parse this as a cryptographic key, resulting in a handshake failure. 2. Port Misconfiguration

If your phone is caught in an aggressive loop, the Boot ROM may be unresponsive because it never completely power-cycles between attempts. Unplug the phone from the computer.

Restart your PC to commit the lower-level kernel alterations. 4. Try an Alternate Flashing Mode handshaking error unexpected response 0x68

Faulty bootloader communication during firmware flashing (e.g., STMicroelectronics STM32, Microchip PIC, or AVR chips using UART/SPI).

Another frequent culprit is a hardware flow control (handshaking) mismatch. If one device expects hardware handshaking using RTS/CTS lines, and the other has it disabled or uses different pins, communication will fail. The receiving device may interpret noise or line state changes as data, resulting in a 0x68 appearing at an unexpected time. This can also occur with software XON/XOFF flow control if the devices are not configured identically. The most frequent cause is trying to connect

Charge the phone using a wall charger for at least 15 - 30 minutes before attempting any flashing or bypassing.

In rare cases involving specific legacy cryptographic libraries, hexadecimal codes map to internal alert descriptions. In the TLS specification, alert codes are used to report failures. While standard TLS alerts usually max out at lower numbers (like 0x46 for user_canceled), custom wrapper libraries or proprietary protocols sometimes use 0x68 (decimal 104) to signify a connection reset or an unsupported feature flag during negotiation. Root Causes of Error 0x68 Restart your PC to commit the lower-level kernel alterations

The most frequent cause of BootROM communication failures is a faulty USB driver on your Windows PC. If the computer is using generic Microsoft drivers instead of the dedicated MediaTek Preloader USB VCOM drivers, the handshake will inevitably time out or return arbitrary hex codes like 0×68. 2. Incompatible Download Agent (DA) or Scatter Files