Also known as a Network Control Key (NCK) or simply an "unlock code," this is a numeric code specific to your device's IMEI. When you insert a SIM card from an unsupported network, the router will prompt you to enter this code to permanently remove the network restriction.
No, unlocking does not change the hardware capabilities. The maximum speeds and Wi‑Fi range remain the same. However, using a custom or unlocked firmware can sometimes provide a more stable connection or additional features like better SMS management or advanced firewall rules. unlock huawei b311221 updated