Search for "Huawei B311221 V100R001" generic firmware. Look for firmware with no carrier code (e.g., "WEBUI_17.100.09.00.03").

The SIM card slot is typically located behind a small cover on the side or bottom of the device.

: The system will automatically detect the foreign SIM card and prompt you with a message: "Enter Network Unlock Code" or "SIMLock Code Required" . Carefully type your code and click Apply or OK .

Remove the back cover and battery (if applicable) or log into the web interface at http://192.168.8.1 → Device Information → IMEI.

There are two primary reliable ways to safely remove the carrier restriction from a Huawei B311-221 Go to product viewer dialog for this item. without risking damage to the device. Method A: The Official Carrier Unlock Code (Recommended)