Changing the IMEI of a mobile device is illegal in many jurisdictions and can lead to permanent blacklisting of the device by network operators. Manufacturers like HMD/Nokia do not provide codes to change an IMEI, as it is a unique permanent identifier.
While there are no official manufacturer codes to "change" an IMEI, several secret codes are used for diagnostic and identification purposes on the Nokia 108: : Displays the current IMEI number. : Views the current software and firmware version. nokia 108 rm 961 imei change code
In the golden age of early mobile technology, "unlocking codes" were standard. You typed *#06# to see the IMEI, and perhaps a specific sequence to unlock a carrier lock. This led to a misconception that other identifiers could be changed just as easily. Changing the IMEI of a mobile device is