HCU is a commercial tool that connects via (USB 1.0). While primarily used for unlocking bootloaders and FRP bypass, it includes flashing capabilities for certain partitions.
Here are realistic scenarios where a dedicated flash tool becomes necessary: hisilicon kirin 710 flash tool
If your phone is completely dark, no vibration, no charging LED—but connects as “Huawei USB COM 1.0” in Device Manager. It’s in bootrom download mode. Only IDT or similar tools can revive it. HCU is a commercial tool that connects via (USB 1
The NV partition holds IMEI, Wi-Fi MAC, and serial numbers. Write down your IMEIs. It’s in bootrom download mode
To understand the tool, one must first understand the challenge. The Kirin 710 typically runs within Huawei’s proprietary ecosystem. Unlike many Android manufacturers who utilize generic Qualcomm protocols for flashing, Huawei developed a distinct firmware format known as "Update.app." This file structure contains the operating system, bootloader, modem, and various partition images. A flash tool designed for the Kirin 710 must be capable of parsing this specific container, authenticating the firmware signature, and writing the data to the correct partitions on the eMMC or UFS storage. Because Huawei maintains a "walled garden" approach to its software, the flashing process is often more rigid and secure than that of its competitors, necessitating specialized tools rather than generic Android ADB interfaces.