This points to a driver issue. Reinstall the Huawei Handset WinUSB drivers, try a different USB port (preferably a USB 2.0 port on the back of the motherboard), or use a different USB cable.
Disassemble the back cover of the phone to access the motherboard.
The MRT HW Flash Tool 77 remains a solid choice for technicians working on . If you frequently handle unbricking or FRP removals for models from 2018–2021, it is a "must-have" utility. For 2024 flagship devices, you may find better success with more frequently updated tools like UnlockTool or ChimeraTool .
Connect your device in the necessary mode (e.g., USB COM 1.0 for Kirin flash, Fastboot for unlock). mrt hw flash tool 77
Typical workflow
Writes official stock firmware (Update.app or scatter files) to unbrick dead phones.
Flashing system images, checking device info, and unlocking FRP. Power off, hold , and connect the USB cable. ADB Mode This points to a driver issue
Before attempting to use the tool, you must prepare your environment to prevent connection drops or failed flashing sequences, which can permanently damage your phone. 1. Hardware Requirements A stable Windows PC (Windows 7, 8, 10, or 11). A high-quality, original USB data cable.
The MRT HW Flash Tool is often accessed as part of a larger, "pre-activated" software package. The steps below are based on common workflows for such bundles.
Turn off the phone. Hold the Volume Down button and connect the device to your PC via a USB cable. The MRT HW Flash Tool 77 remains a
: Compatible with models like Mi 5, Mi 4, and the Redmi Note series for password removal and flashing.
This points to driver conflicts. Check Windows Device Manager to ensure there are no yellow exclamation marks next to your device connection. Switch to a USB 2.0 port instead of USB 3.0.