The phrase refers to a unique 15-to-20-digit numeric code (often called a Master Code or NCK code) that resets the network lock on your specific device.
Yes. That IMEI is unique to your phone. Never share it publicly; a malicious actor could clone your phone’s identity. NOKIA MODEL 100 TYPE RH 130 UNLOCK CODE
Power on the phone. After a few seconds, it should display: “SIM card not valid” or “Enter restriction code.” The phrase refers to a unique 15-to-20-digit numeric