: Tools like "box" interfaces or specific service software used by professional technicians to "repair" a corrupted IMEI. 3. Legal and Ethical Risks

Re-flash the original Nokia stock firmware using Nokia OST LA (for Android) or Phoenix Service Software (for old Symbian). This restores the IMEI without changing it.

Your friend is either lying or using a modified, illegal tool on a very old (pre-2010) Nokia feature phone. No modern Nokia smartphone supports this.

: The primary reason for strict IMEI laws is to prevent the resale of stolen phones, which are often "blacklisted" by carriers. Security Concerns

is a unique 15-digit serial number assigned to every mobile phone. It acts like a digital fingerprint, allowing networks to identify valid devices and block stolen ones. How to Check Your Nokia IMEI