Never install a firmware meant for the HG8245H, HG8247, or the older HG8245. The “W5” suffix indicates a specific Wi-Fi chipset (Realtek RTL8812). Wrong firmware can brick your device permanently.
Restore your configuration file using the backup created in Step 2. huawei hg8245w5 firmware upgrade
Igor, a man who believed in redemption through firmware, saw not junk, but potential. Never install a firmware meant for the HG8245H,