For most MTK devices:
Alternative: Short KCOL0 to KROW0 (test point) for forced BROM.
Many handshake errors disappear when communicating directly with BootROM instead of Preloader.
Method:
There isn't one single cause. Based on thousands of forum posts (XDA, GSM-Forum, Hovatek) and real-world repair logs, the handshake error usually falls into one of five categories:
This sounds trivial, but a faulty cable that drops packets or a USB 3.0 port (which handles low-level serial signals poorly) can corrupt the handshake data. A USB Hub is almost guaranteed to cause this error.
The MTK Bypass Tool (by UnlockTool or other developers) is used to bypass SP Flash Tool authentication, SLA (Secure Lock Authority), and DAA (Download Agent Authentication) on MediaTek devices. It allows:
Handshaking errors are almost always driver or timing-related. Don’t rush – try different USB ports, cables, and button combinations. For newer MediaTek chips (Dimensity series), you may need a hardware bypass (like EMMC/ISP tool) or a paid service.
MTK Bypass Tool handshaking error typically indicates a communication failure between your PC and a MediaTek (MTK) device while trying to establish a secure connection for bypassing authentication (Auth). This critical first step allows users to perform tasks like flashing or removing FRP (Factory Reset Protection) without needing official manufacturer authorization files. Common Causes of Handshaking Errors
Handshake failures usually stem from hardware connection issues or software configuration conflicts: Driver Conflicts:
Improperly installed or missing MTK VCOM/Preloader drivers are the most frequent cause. Disabled Bootrom (BROM):
Newer security patches (e.g., on Vivo or Lenovo devices) may have BROM completely disabled or "fused," making standard handshake methods fail. Incorrect Boot Key Sequence:
Failing to hold the correct volume buttons (usually Volume Up + Down) while connecting the USB cable prevents the device from entering the required mode. Faulty Hardware:
A damaged USB cable, a loose charging port, or even a low battery can interrupt the sensitive handshake process. Unsupported SoC:
The tool may not yet support the specific hardware code or chipset of your device (e.g., Dimensity 8300/MT6897). How to Resolve the Handshaking Error mtk bypass tool handshaking error
To fix these errors, you can follow these systematic troubleshooting steps:
Handshake failed, retrying... #44 - bkerler/mtkclient - GitHub
The "handshaking error" in the MTK (MediaTek) Bypass Tool typically occurs when the tool cannot establish a stable communication link with the device's BootROM (BROM)
. This failure prevents the exploit from disabling the device's secure boot protection. Common Causes Driver Conflicts
: The most frequent cause is incorrect or missing drivers. Windows often fails to correctly identify the device in BROM mode without a libusb-based filter driver Incorrect Boot Mode
: The device may be booting into "Preloader" mode instead of the required "BROM" mode. BROM mode is necessary for the bypass to function. Locked Hardware
: Some manufacturers (e.g., Lenovo) have disabled BootROM access on certain devices, making a handshake physically impossible without hardware modifications like "crashing" the preloader. Cable or Port Issues
: Using a low-quality USB cable or a USB 3.0/3.1 port can sometimes cause timing issues during the high-speed handshake process. Troubleshooting & Solutions Update Drivers to install the libusb-win32 driver for the "MediaTek USB Port". Check Key Combo To force BROM mode, hold Volume Up + Volume Down
(or just one, depending on the model) while plugging in the USB cable. Reset the Device If the tool is stuck, hold the Power button for 10–15 seconds to force a hard reset before trying again. Bypass Antivirus Ensure your antivirus hasn't quarantined the tool's
or Python scripts, as they are often flagged as "false positives". Verify Python Setup
Ensure you have installed required dependencies via terminal: pip install pyusb pyserial json5 Advanced Indicators Echo Mismatch
: If you see "Echo mismatch: expected 5f, got a0," it usually means the tool is talking to the instead of the
. You may need to use a "crash" utility to force the device into the correct mode. Phantom Output
: A single "Handshake failed" message that doesn't repeat may simply be the tool scanning for devices that aren't there. for Windows or a list of supported MediaTek chipsets for this tool? Handshake failed on lenovo x306x (Mediatek Helio P22T) #58 For most MTK devices:
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 is a common communication failure that occurs when the tool (such as
or UnlockTool) fails to establish a secure connection with a MediaTek device's BootROM (BROM)
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
: This is the most frequent cause, particularly under Windows. Incorrectly installed USB VCOM or LibUSB filters can prevent the device from being recognized in the correct mode. Incorrect Connection Mode Alternative: Short KCOL0 to KROW0 (test point) for
: Handshaking often fails if the device is not properly forced into
. This usually requires holding specific hardware buttons (Vol Up + Vol Down) while connecting the USB cable. Disabled BootROM
: Some manufacturers, such as Lenovo, may have disabled the BootROM on specific models, making it nearly impossible to initiate a standard handshake. Hardware Failures
: Damaged USB cables or ports, or a low battery, can lead to "Device not ready to handshake" messages. Incompatible Software Versions : Running older versions of a tool like
on a device with a newer security patch (e.g., HyperOS or late Samsung security updates) can cause protocol mismatches. Solutions and Troubleshooting Steps Reinstall Drivers
: Clean out existing MediaTek drivers and reinstall the latest MTK USB VCOM drivers . Ensure that LibUSB-Win32
filters are correctly applied to the MediaTek USB Port while the device is connected. Verify Connection Method : Power off the device, press and hold Volume Up + Volume Down , and then connect the USB cable. Preloader Mode
: Connect the USB without pressing any hardware buttons, or hold only one button if specified by your tool. Physical Reset
: If the tool is stuck "Waiting for device," disconnect the battery (if possible) or hold the Power button for 10–15 seconds to force a hard reset before trying again. Hardware Check
: Use a high-quality, short USB cable and ensure the device has at least 30% battery charge Tool-Specific Fixes : For users of UnlockTool , ensure you are using the correct Custom DA (Download Agent) for your specific model (e.g., Samsung A06). filter your USB port
using LibUSB to specifically resolve driver-related handshake failures? Handshake failed on lenovo x306x (Mediatek Helio P22T) #58
The Digital Dead End: Decoding the "Handshaking Error" in MTK Bypass Tools
In the shadowy corners of mobile repair and firmware modification, few things are as frustrating as the "Handshaking Error." It is the digital equivalent of a limp handshake—a gesture started but never completed. For technicians and enthusiasts working with MediaTek (MTK) devices—specifically trying to bypass Factory Reset Protection (FRP) or unbrick a phone—this error is the gatekeeper standing between a functioning device and a expensive paperweight.
But what exactly is going on beneath the screen when this error strikes? It is rarely a single problem; it is usually a symphony of small failures.