For certain older chips (like MT6575/77), you may encounter handshake errors due to watchdog register bit-size mismatches. You may need to edit the config.py and device.py files within the tool to force 16-bit register handling.
Most handshaking errors stem from a bad driver filter configuration. Download and open . Launch your MTK Bypass Tool and click Crash PL or Bypass . Power off your phone completely.
sudo rmmod cdc_acm sudo systemctl stop ModemManager
Most handshaking errors stem from a corrupted driver stack, especially conflicts between standard VCOM drivers and LibUSB. mtk bypass tool handshaking error
on Windows 10/11 before installing.
Try different DA/Scatter files and tool settings
[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 For certain older chips (like MT6575/77), you may
Plug the cable directly into the (back of the PC) rather than front-facing ports or USB hubs, which often lack sufficient power/data stability. Force BROM Mode (Advanced)
Old, ghost USB drivers can hijack the COM port needed by the bypass tool. Right-click the Windows Start menu and open . Click View at the top menu and check Show hidden devices .
| Tool Name | Primary Platform | Key Features | Where to Find | | :--- | :--- | :--- | :--- | | | Cross-Platform (Linux recommended) | The most popular open-source tool for unlocking and flashing MTK devices. Handles BROM/Preloader communication. | GitHub - bkerler/mtkclient | | Bypass Utility | Cross-Platform | A focused tool specifically for bypassing security protections to gain BROM access. | GitHub - MTK-bypass/bypass_utility | | SharpMTKClient | Windows (C#) | A GUI-based alternative with no Python dependencies. Uses Windows API and Libusb for SLA bypass. | GitHub - Alephgsm/SharpMTKClient | Download and open
Troubleshooting MTK Bypass Tool Handshaking Errors The "Handshaking Error" (or "Protocol: Failed to handshake with device") is a frequent hurdle when using MediaTek (MTK) bypass utilities like MCT Bypass Tool UnlockTool
Always plug the USB cable into the rear ports of a desktop PC. Avoid front panel ports or USB hubs.