Look through the list. You will likely see an unknown device with a yellow warning triangle labeled or listed under "Other Devices" as USB SER or HUAWEI USB COM 1.0 . Step 3: Manually Update the Driver
: Use a pair of tweezers to touch the specific test point dot on the motherboard and a metal ground (like the shield) simultaneously. Connect to PC : While holding the short, plug in the USB cable. Phase 2: Manual Driver Installation
Windows often blocks these drivers because they are older or self-signed. Click > Power . Hold the Shift key and click Restart .
| Problem | Possible Cause(s) | Solution | | :--- | :--- | :--- | | | Windows driver signature enforcement; poor physical short connection | Reboot PC with "Disable driver signature enforcement" enabled. Use a multimeter to ensure the ground connection is solid. | | Device shows as "USB SER" with a yellow exclamation mark in Device Manager | Driver is not correctly installed for the detected hardware ID | Right-click "USB SER" → "Update driver" → "Browse my computer" → "Let me pick from a list" → Find and manually select the "Huawei USB COM 1.0" driver from the list. | | "Error writing to serial port" / "Sending boot failed" | Battery connection issue; incorrect USB port; using a non-original cable | Ensure the battery is fully charged and firmly connected to the motherboard. Plug the phone into a motherboard-mounted USB port on the back of the PC, not a front-panel port. | | Connection is unstable or drops during flashing | Low-quality USB cable; ground loop interference | Use the shortest, highest-quality USB cable available. Try to run the process on a laptop running solely on battery power, disconnected from its charger. | | Phone appears in Device Manager, but the service tool says "Device not found" | Incorrect COM port selected in the tool; the phone is in the wrong mode | In the service tool, manually cycle through the available COM ports to find the correct one. Verify "HUAWEI USB COM 1.0" is active and not being used by another process. | test point driver huawei install
Do not use random "Driver Updater" tools. You need the official Qualcomm QDLoader 9008 driver (modified for Huawei). A safe source is usually inside flashing tools like IDT (Huawei Download Tool) or HCU Client .
After installation, verify that the Test Point Driver is installed correctly by checking the Device Manager on the computer. The device should be recognized as a Huawei Test Point device.
Once the driver is installed, the physical procedure begins. This process requires patience and a steady hand. Look through the list
Finding the correct test point is the most physically demanding part of the process. The test point consists of two very small, exposed copper pads or resistors on the phone's motherboard. Shorting these together tricks the CPU into booting into Factory Mode.
A: You missed a step. Reboot and repeat Step 1. You must be in "Test Mode" or have signatures off. Also, disable your antivirus temporarily (Windows Defender blocks these drivers).
You can flash any partition, including the bootloader and IMEI zones. One wrong click in IDT or a wrong firmware file (e.g., flashing "Chipset" instead of "Board") will permanently hard-brick the device. Connect to PC : While holding the short,
Follow these exact steps to manually install the driver via the Windows Device Manager. Step 1: Connect the Phone via Test Point Power off your Huawei device completely. Remove the back cover to expose the motherboard.
If Device Manager shows the port perfectly but servicing software (like SigmaKey, EFT Dongle, or Chimera) cannot find it, registry filters are likely blocking it. Run the driver installer utility as an administrator to clean old registries, or manually match the COM port number in the flashing software settings to match the number displayed in Windows Device Manager.