Ensure a stable wired connection (Ethernet) rather than Wi-Fi for manual updates. Updates may fail if "not approved" by the ISP.

This is the most common method for power users to ensure they have the specific version they need.

The ISP may have changed default credentials. Request the password from them.

Connect a PC to the router and access the login page via http://192.168.100.1 .

Wait for the ISP to push an automatic Over-the-Air (OTA) update. How do I update the firmware version of my HUAWEI router