The "handshaking error" in MTK (MediaTek) bypass tools usually occurs when the computer and the device fail to establish a stable communication link in BootROM (BROM) mode. This is often due to driver conflicts, improper connection sequences, or hardware-level protections. Common Fixes for Handshaking Errors Check Driver Installation
Ensure you have the MTK VCOM USB Preloader Drivers correctly installed.
Disable Driver Signature Enforcement on Windows 10/11 before installing.
Use LibUSB Win32 to "Filter" the MTK USB Port when the device is connected. Correct Connection Sequence Power off the device completely. Open the bypass tool and click "Start" or "Bypass."
Hold both Volume Up + Volume Down buttons simultaneously while plugging in the USB cable. If that fails, try only Volume Up or only Volume Down. Use High-Quality Cables and Ports Use the original USB cable if possible.
Plug the cable directly into the motherboard ports (back of the PC) rather than front-facing ports or USB hubs, which often lack sufficient power/data stability. Force BROM Mode (Advanced)
If the phone keeps restarting or showing "Preloader" instead of "BROM," you may need to disconnect the battery internally and reconnect it before trying again.
For hard-bricked devices, you might need to use Test Points on the motherboard to force the device into BROM mode. Software Environment
Ensure Python is added to your System Path if using scripts like mtkclient.
Close other conflicting software like phone managers (Samsung Smart Switch, iTunes, etc.) that might be "grabbing" the COM port. Troubleshooting Summary Table Error Symptom Likely Cause Recommended Action mtk bypass tool handshaking error
The "MTK Bypass Tool Handshaking Error" is a common communication failure that occurs when a MediaTek (MTK) device fails to establish a stable link with a computer while in BootROM (BROM) or Preloader mode. This typically happens because the tool cannot "catch" the device in its brief connection window before it attempts a standard boot. Common Causes
Driver Conflicts: This is the most frequent cause, often due to missing or improperly configured libusb or VCOM drivers on Windows.
Failed BROM Entry: The device must be powered off and connected using specific hardware button combinations (e.g., Volume Up + Down) to trigger the correct mode.
Disabled BootROM: Some manufacturers, such as Lenovo, may disable BootROM on certain models, causing the handshake to fail consistently.
Unsupported Chipset: The specific MTK chipset might not be supported by the payload or script version you are using. Step-by-Step Fixes
Install/Reset Libusb Filters: Use a tool like Libusb-win32 or the filter wizard to "filter" the MediaTek USB Port. Ensure you catch the device in the device manager during the brief moment it appears to apply the filter. Verify Hardware Connection:
Power Off: Ensure the phone is completely off before connecting.
Button Combo: Hold Volume Up + Volume Down simultaneously while plugging in the USB cable.
Battery Cycle: If the tool is stuck "waiting for device," disconnect the battery (if possible) or hold the power button for 10 seconds to force a reset before trying again. The "handshaking error" in MTK (MediaTek) bypass tools
Check Driver Installation: Verify that the MTK VCOM and Usbdk drivers are installed. If you are on a 64-bit system, ensure you are using the correct 64-bit drivers.
Use Test Points: For newer or stubborn devices that refuse to enter BROM through buttons, you may need to use a test point (shorting a specific pin on the motherboard to ground) to force the handshake.
Disable Watchdog: Some tools like Android Utility have options to disable the "Watchdog" timer, which can sometimes stop the device from rebooting before the handshake completes.
Note: Always use a high-quality USB data cable and avoid using front-panel USB ports on desktop computers, as they often provide insufficient power or data stability for flashing.
Are you currently working with a specific phone model or MTK chipset that is throwing this error? Handshake failed in MTKClient? - Hovatek
Here’s a complete review of the MTK Bypass Tool Handshaking Error — covering what it is, why it happens, and how to fix it step by step.
The most common user error is timing. You cannot connect the phone and then click "Start."
The correct workflow for MTK Bypass Tool:
bypass.bat). Wait for the prompt: "Waiting for device..."Pro Tip: If you fail, disconnect the battery (if possible) or hold the power button for 15 seconds to reset the PMIC before trying again. Step 4: Master the Timing (The "2-Second Rule")
| Step | Action | Expected Outcome |
|------|--------|------------------|
| 1 | Use USBDeview (Windows) or lsusb (Linux) to detect device presence. | Device should appear as MediaTek Inc. USB VCOM or BROM mode (0x0e8d:0x0003) |
| 2 | Check driver: On Windows, use Zadig to replace driver with libusb-win32 or WinUSB. | No yellow exclamation in Device Manager. |
| 3 | Try different USB 2.0 port + short, high-quality cable. | Stable connection. |
| 4 | Force BROM mode (ground KCOL0 pin or use test points). | Device appears as MTK USB Port (COMx) even without battery. |
| 5 | Test with SP Flash Tool (read memory). | If SP Flash Tool can handshake, problem is bypass tool-specific. |
| 6 | Monitor USB traffic using Wireshark + USBPcap or Bus Hound. | See if device sends NACK or no response. |
This is the most interesting and difficult cause. The MTK Bypass tools largely rely on a vulnerability discovered in specific chipsets (like the MT6735, MT6755, etc.). However, MediaTek has patched this vulnerability in newer chipsets (like the Helio G series or Dimensity series).
If the handshake fails due to authentication (error: SLA/DAA handshake failed), you need a different approach.
mtkclient Tool: Download the latest version of mtkclient (Python) rather than the GUI bypass tool. It often contains updated exploits for newer chips.Before fixing the error, we need to understand the tool. The MTK Bypass Tool is a software utility designed to exploit vulnerabilities in MediaTek’s preloader and BROM (Boot ROM). It allows users to bypass security authentication (like SLA and DAA) to perform low-level operations such as:
The tool works by sending a specific sequence of bytes to the phone’s processor before the Android OS boots. This process is called Handshaking.
In telecommunications and computer hardware, handshaking is an automated process of negotiation that sets up parameters of a communication channel between two entities (your PC and the phone’s CPU).
When you connect your MTK phone in BROM mode:
If any part of this 4-step dance fails—if the phone doesn't respond, responds with garbage data, or the PC misses the timing window—you get the Handshaking Error.