To anyone else, it was just a piece of hardware—a gateway for data. To Elias, it was a liability. The module's factory-stamped

: If attempting legitimate authorized changes, the modem interface must often be in a specific condition (e.g., disconnected from WAN) for commands to be successful. Quectel Forums Risks and Legal Warnings

Modifying the International Mobile Equipment Identity (IMEI) of a Quectel EC25 module is a sensitive procedure typically reserved for legitimate device repair or manufacturing restoration. While the process is not documented in standard AT command manuals, it can be achieved using specific engineering commands.

Specialized software like "unlock code calculators" or terminal emulators are often used in unofficial tutorials to send these commands to the hardware. Key Considerations and Risks Instructions to change the IMEI - PinePhone - PINE64 Forum

This command is used to write the IMEI to certain chips, but on most Quectel EC25 firmware versions, it is either:

The EC25 uses a standard Hayes command set over its serial ports.