If you bought an unlocked generic B311 and updated it through an official carrier prompt, the update might re-lock the device to a specific network.
Updating standard firmware will not unlock a SIM-locked router. To unlock it, you need to flash a modified firmware or use an unlock code specific to your device's IMEI. Where can I safely download Huawei B311 firmware? huawei b311 firmware
The router will upload the file, flash the memory, and reboot. This process may take up to 10 minutes. Post-Update Optimization Techniques If you bought an unlocked generic B311 and
is locked to a specific network (e.g., MTN, Vodafone, Telkom) or you want to flash custom firmware (e.g., to add bridge mode or B-band selection), you will need to perform a "flash" process. Where can I safely download Huawei B311 firmware
Before looking for updates, verify your router's current configuration to avoid flashing an incompatible version.