However, there is one major frustration: . If you purchased your B311221 through a mobile network provider, it is likely SIM-locked. This means you cannot use a SIM card from a different carrier.
Congratulations! Your router is now carrier-free. Here’s how to maximize it: unlock huawei b311221 updated
Alternatively, log into the web management page using the router’s default IP address (found on the bottom nameplate) to check for and install the latest firmware versions manually. However, there is one major frustration: