In cases of hard bricks—where the device cannot even reach the recovery menu—the process becomes more complex. Technicians often employ specialized "Service Tools" (often leaked or proprietary service center software). These tools interact with the device at a lower level, often engaging the bootloader to force-flash the partitions.
Huawei Nova 5T YAL-L21 10.1.0.245(C432E7R3P1) Firmware dload nova 5t flash file fix