Unlock Huawei B311221 Install ^new^

should appear automatically. Carefully enter the unlock code you obtained. Confirmation

Once unlocked, follow these steps to install and configure your new network connection: 4G Router Network Unlock - Huawei unlock huawei b311221 install

From here:

Some B311221 firmwares allow unlocking via hidden console. should appear automatically

Power off the router and insert a SIM card from a different network provider. unlock huawei b311221 install