Ensure you are using a rear USB port on your PC for adequate power delivery.
: Connect to the router via Ethernet or Wi-Fi, go to the web management page (usually 192.168.8.1 ), and log in with your admin credentials (default is often admin ). You will be prompted to enter the "SIMLOCK" or "NCK" code. Huawei Router B311-221 Unlock Firmware
: Essential for your computer to recognize the router in download mode. Ensure you are using a rear USB port
: Modifying firmware almost certainly voids any remaining manufacturer warranty. Huawei Router B311-221 Unlock Firmware