Flashing a Hi3798 is not as simple as adb sideload . Because these devices are often bricked or unbootable, you need hardware-level tools.
Finding the right firmware for a device using the Hisilicon HI3798 chipset (like the Hi3798MV100 hi3798 firmware
Often requires a USB-to-TTL serial adapter or a USB-to-USB male cable. Users must often hold a physical reset button Flashing a Hi3798 is not as simple as adb sideload
For "bricked" devices or complete OS replacements (e.g., moving to OpenWrt), a serial or eMMC tool is used: Huawei Hi-Tool for direct eMMC flashing. Connection: moving to OpenWrt)
is the official HiSilicon tool used for low-level flashing via a PC. Hardware Interface : Requires a USB male-to-male cable Pin Shorting