: Contact the customer support of the carrier the device is currently locked to. They usually provide the code for free if your contract is completed or for a small fee. You can find more about obtaining NCK codes on JustAnswer .
Log in (default is usually admin / admin or the password on the sticker). A prompt will appear stating . unlock huawei b311221 updated
Unlocking this model typically requires accessing the device's web management interface or using specialized mobile apps. : Contact the customer support of the carrier