are professional-grade tools used by technicians to write the original IMEI back to the device after a flash failure. Connectivity
If a Nokia 108 is reported stolen or lost, the original IMEI gets blacklisted. In some countries, carriers share a central database (CEIR in India, GSMA global list). A user who bought a second-hand phone may find it cannot make calls. They search for an IMEI change to "revive" the hardware. nokia 108 rm 961 imei change code new