: Improved support for IPv4/IPv6 dual stack , ensuring compatibility with modern ISP infrastructure.
Strengthened wireless security protocols to prevent unauthorized access. huawei b311221 firmware updated
If a previous update failed and your B311221 is stuck with a blinking light or no response, use recovery mode: : Improved support for IPv4/IPv6 dual stack ,
Wait for the progress bar to reach 100%. The router will reboot. huawei b311221 firmware updated