Huawei B311s-220 Unlock Firmware New! Jun 2026

The flashing process was interrupted, or you used firmware meant for a different B311 variant (e.g., B311s-221).

Look for B311s-220_Service_Firmware.bin . This is a developer build that unlocks Telnet and root access. It allows you to permanently edit the MBN (modem configuration) file. huawei b311s-220 unlock firmware