For units stuck on very old V100R006 firmware without web recovery, a serial console (TTL 3.3V on J3 header) is required to reflash the bootloader. In such cases, consider hardware replacement as a more economical solution.
# Show flash partitions cat /proc/mtd backup cfg by tftp 192.168.1.10 backup.cfg Restore factory defaults restore factory Enable root shell (if busybox available) sh huawei hg8245 firmware