The firmware is designed for plug-and-play functionality.
The B311-221 is essentially a mini Linux computer. Its firmware is a modified OpenWrt/Derivative running on a custom HiSilicon SDK. huawei b311-221 firmware
The is a Cat.4 LTE router designed for stable home or small office internet. Specification Max Download Speed 150 Mbps (64QAM) Max Upload Speed 50 Mbps (16QAM) Wi-Fi Standard 2.4GHz 802.11b/g/n (up to 300 Mbps) User Capacity Up to 32 simultaneous devices Connectivity 1 x Gigabit LAN/WAN port, 1 x RJ11 for Voice Security Firewall, WPA/WPA2-PSK, VPN client (L2TP/PPTP) Important Troubleshooting Tips HUAWEI B311 – обсуждение - 4PDA The firmware is designed for plug-and-play functionality