Once unlocked, you can further enhance your signal by using the B311-221 Chrome Extension . This tool allows you to manually test and lock into specific frequency bands to find the strongest signal in your area.
: Enter the code you received. The router is now permanently unlocked for all compatible SIM cards. Key Maintenance and Firmware Tips unlock huawei b311221 updated
Insert a SIM card from a different network into the router. Once unlocked, you can further enhance your signal