: One Gigabit LAN/WAN port and one RJ11 port for voice services.

Some variants of the Huawei B311 support flashed custom firmwares like OpenWRT, which allows for advanced networking features, such as tailored VPN setups and better traffic management.

| Firmware Version | Key Improvements | |----------------|------------------| | | Initial release – basic LTE band locking via HiLink. | | 11.171.01.01.123 | Fixed IPv6 connectivity issues. Added DMZ option. | | 11.178.01.01.456 | Improved carrier aggregation (2CA). Updated security patches (CVE-2021-39801). | | 11.178.03.02.789 | Added “SMS over WebUI” for some carriers. Improved external antenna switching logic. | | 11.182.07.00.002 | Latest as of 2024/2025 – stability fixes for 4G/5G DSS networks. Removed telnet backdoor. |

: Open the app, select your B311 router, and tap Updates .

Configure specific after an update. How do I update the firmware version of my HUAWEI router

If OTA fails or you have a downloaded .bin file, use the manual method.

If your B311-221 was branded by a specific telecom provider, flashing generic unbranded firmware might cause a lock error. You may need to flash the specific carrier-customized firmware back onto the device. A Note on "Unlocking" and Custom Firmware

Improved IPv4/IPv6 dual-stack support and NAT configuration.

Sometimes the web interface glitches. Clear your browser cache or try using a different browser (like Chrome or Edge) in Incognito mode. 2. Router Boots into a "Red Light" Loop

Wait for the process to complete. during this process, as it can permanently damage (brick) the device. The router will restart automatically when finished. Method 2: Manual Update (Local Update)

This comprehensive guide covers everything you need to know about the Huawei B311-221 firmware, including how to update it, troubleshoot failures, and unlock its full potential. Why Firmware Updates Matter for the Huawei B311-221