The IMEI — a 15-digit serial number — is a device’s fingerprint. Changing it is illegal in most jurisdictions, akin to swapping a car’s VIN. But someone had done exactly that.
On older Quectel modules (like M95 or M66), a hidden AT command may work: quectel change imei
For many Quectel modules, the IMEI is stored in a protected non-volatile memory area. Standard documentation Quectel AT Commands Manual often only lists commands for viewing the IMEI. 1. Checking the Current IMEI The IMEI — a 15-digit serial number —