You are not alone. This error is the single most common issue faced by technicians and enthusiasts using the MTK Bypass Tool (usually the utility developed by unlocktool or similar open-source developers).
Windows 10 and 11 are notorious for automatically installing the wrong USB drivers for MediaTek devices. If the device shows up as "MTK USB Port" or "Android ADB Interface" instead of "MediaTek PreLoader USB VCOM Port," the handshake will fail.
The occurs when the bypass utility fails to sync with the device’s BootROM (BROM). This is typically a physical or driver-level timing issue, as the phone only stays in the required BROM state for a few seconds before switching to Preloader mode or charging. 0;16;
Confirm device boot mode
In some cases, the tool's server-side authentication fails if your PC's system date and time are incorrect, leading to a generic "handshake failed" message. specifically to filter MTK ports? MCT MediaTek Bypass Tool not Working Solution mtk bypass tool handshaking error
If Python-based scripts fail, many users find success with the . Unlike manual scripts, MCT often includes an automatic filter driver installer ( libusb-win32-devel-filter ), which resolves handshake issues by automatically managing the connection protocol during the critical boot window. What to do after a Successful Handshake
Based on user reports and feedback, the following are some common causes of the handshaking error:
The most common culprit is the libusb-win32 filter driver. If the driver is not correctly filtered for the MediaTek USB Port, the bypass utility cannot "capture" the device before the OS takes control.
. This error typically indicates that the software cannot establish a secure communication channel with the device's Boot ROM (BROM) or Preloader. Common Causes Driver Conflicts You are not alone
: Tools like mtkclient may report "Handshake failed, retrying" if they attempt to connect to unsupported devices or if the port is busy.
| Positive | Negative | |----------|----------| | Works perfectly on MT67xx/MT65xx | Frequent handshake errors on MT68xx/MT69xx | | Free and easy for old chips | Poor documentation | | Good for FRP bypass | No GUI for many versions | | Supports bootrom exploit | Requires test points on newer devices |
Select "Install a device filter" in the LibUSB window.
This error usually stems from physical connection issues or software mismatches that prevent the tool from "seeing" the device correctly: If the device shows up as "MTK USB
The tool works by communicating with the device's MTK processor and modifying the device's firmware to disable FRP. The process involves several steps, including:
mode. This error prevents the tool from bypassing the authentication (DA/Auth) required for flashing, unlocking bootloaders, or removing FRP locks. Common Causes of Handshaking Errors Driver Conflicts
The is a critical failure in the synchronization process between a MediaTek (MTK) device and a computer. It occurs when the bypass utility (such as mtkclient , MCT MediaTek Bypass , or UnlockTool ) fails to establish a secure communication bridge with the device's bootrom (BROM) or preloader mode. Without this "handshake," the tool cannot disable the device's hardware-based authentication (DA/SLA/AUTH), making it impossible to flash firmware or bypass FRP (Factory Reset Protection). Common Causes of Handshake Failure
[2025-03-20 12:34:56] Waiting for device... [2025-03-20 12:35:01] Device found at COM5 [2025-03-20 12:35:01] Sending handshake... [2025-03-20 12:35:03] ERROR: Handshake failed - no ACK received [2025-03-20 12:35:03] Bypass aborted