One wrong byte can brick the module. QFIL is unforgiving – no “undo”. Requires vendor-specific firehose programmers ( .mbn files), which are not publicly available for EC25 without an NDA with Quectel.

Changing the IMEI of a Quectel EC25 module typically involves using AT commands. AT commands are a set of standard commands used to control a modem. Here’s a general guide on how to do it:

by the manufacturer, as it serves as a unique identification code for the module. Modification is typically only allowed for legitimate repair or regulatory purposes after signing legal agreements with Quectel. Quectel Forums Official Procedures

If you receive an ERROR , the command may be locked. Some firmware versions require a security password (usually provided to OEMs by Quectel) via AT+QPRTPW .

The Quectel EC25 is one of the most popular LTE Cat 4 modules in the M2M and IoT space, prized for its global band support, GNSS integration, and robust AT command set. However, a recurring topic in developer forums and engineering labs is the ability to change its factory-assigned International Mobile Equipment Identity (IMEI). This review explores why one might change it, how it’s done (technically), and the critical legal and operational pitfalls.

To restore the factory IMEI, simply re-run AT+EGMR with the original number you saved in Step 2.

In an era of constant tracking, some developers view the IMEI as a vulnerability. By rotating IDs, a device becomes a moving target, making it harder for third parties to build a long-term profile of a specific machine’s habits.