Huawei B311-221 Firmware [better] Jun 2026

Optimizes band locking and signal reception to improve download and upload speeds.

| 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. |

The Ultimate Guide to Huawei B311-221 Firmware: Updates, Installation, and Troubleshooting Huawei B311-221 Firmware

If your firmware ends in SPCxxx , it is carrier-specific (e.g., SPC01 for Vodafone).

Fixes for various vulnerabilities (CVEs) in the system kernel that could otherwise lead to denial-of-service attacks or memory corruption. Feature Improvements: Optimizes band locking and signal reception to improve

"Update successful. Device is rebooting," the screen read.

cat /proc/version df -h // Shows firmware partition layout Added DMZ option

Many users look for Huawei B311-221 firmware to "de-brand" their device—removing network restrictions to use SIM cards from other carriers.

There are two primary methods to update the firmware: the built-in online update feature and manual flashing. Method 1: The Online Update (Recommended)

Log in using your admin password (found on the label at the bottom of the router if unchanged). Navigate to > System > Device Information . Look for the Software Version (e.g., 10.0.1.1(H697SP2C00) ).

Wrong firmware version applied or power loss during flashing.