Hisilicon Kirin 710 Flash Tool ((top)) Page

: If you have an unlocked bootloader or custom recovery, avoid using the built-in Huawei OTA updater. Doing so can relock the bootloader and replace your custom kernel; it is safer to flash updates through your service tool.

Unlike other manufacturers that use generic flashing protocols, HiSilicon chips (Kirin series) utilize a proprietary bootloader and communication protocol. hisilicon kirin 710 flash tool

: Supports writing original UPDATE.APP files to lower firmware versions . : If you have an unlocked bootloader or