Changing a device's IMEI (International Mobile Equipment Identity) is illegal in many jurisdictions
Unlocking the Mystery: Nokia IMEI Codes and What They Really Do All Nokia Imei Change Code
There is no "secret code" that officially changes an IMEI. Authentic Nokia hardware is designed to prevent this to ensure security. Nokia 3310 User Guide: Restore factory settings - HMD All Nokia Imei Change Code
For general maintenance and verification, these official codes work across most Nokia devices: : Displays the current IMEI number : Displays the Software Version and manufacture date : Performs a Hard Reset (erases all data; default security code is usually : Performs a Soft Reset (restores factory settings without deleting personal data) *#92702689# : Opens the Life Timer or Service Menu Important Considerations All Nokia Imei Change Code
: Dial *3370# to activate better sound quality (at the cost of ~5% battery) or #3370# to deactivate it.