Huawei B311-221 Firmware -

| 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. |