: Connect your PC to the router via Ethernet or Wi-Fi. Open your browser and go to the management page (usually 192.168.8.1 Enter the PIN : The interface will automatically prompt you for a SIM Network Unlock PIN
For the best experience, it is recommended to stick to official support channels and authorized software updates to ensure the longevity and security of your networking hardware.
There is no official unlock firmware from Huawei for this purpose. Any “unlock firmware” comes from third-party developers or hacking communities.
Searching "huawei router b311221 unlock firmware verified" should lead you to these safe havens: