The module will detach from the network, reboot its internal stack, and restart the serial interface. Step 6: Verify the Changes
After receiving an OK response to your modification command, the new IMEI must be committed to the module’s non-volatile memory (NVRAM).
This command is used to write the IMEI to certain chips, but on most Quectel EC25 firmware versions, it is either:
Alex documented his journey and shared it with the community, providing a detailed guide on how to change the IMEI of a Quectel EC25. His post sparked a lively discussion, with some users praising his ingenuity and others warning about the potential risks and consequences of modifying the IMEI.
AT+QPRTPARA=1
Embarking on IMEI modification is not without significant risks:
Yes—with the right access and tools. Quectel modules use a proprietary firmware structure and respond to a set of undocumented or restricted AT commands. The most well-known command for IMEI modification is:
This reboots the module, forcing it to re-initialize its baseband stack and broadcast the newly assigned identity upon its next network registration attempt. Important Legal, Carrier, and Compliance Risks
Several OpenWrt-based router manufacturers have integrated IMEI modification features directly into their web interfaces due to customer demand. For example, GL.iNet’s Mudi routers (based on the EC25) feature a graphical user interface that sends the appropriate AT+EGMR commands to the underlying Quectel module, making the process user-friendly. The research team behind the Mudi specifically developed this UI to facilitate the modification for end users. quectel ec25 change imei
Ensure the correct Quectel LTE Windows or Linux USB drivers are installed. This exposes the necessary COM ports (AT Port, DM Port, NMEA Port).
This prevents conflicts with your serial terminal.
Some EC25 modules ship with IMEI write-protection enabled. To disable it temporarily, you may need the "IMEI unlock password" from Quectel (usually available only to verified OEM customers). However, for most standard EC25 modules:
While Quectel does not officially document these commands in public manuals, users have identified the following methods for IMEI "repair" or modification: AT Commands : The most common undocumented command reported by users is AT+EGMR=1,7,"[NEW_IMEI]" To view current IMEI: To write new IMEI: AT+EGMR=1,7,"15_DIGIT_NUMBER" : This often requires stopping services like ModemManager on Linux to free the serial port. Fastboot Mode The module will detach from the network, reboot
OK
If you need to change IMEIs regularly for legitimate testing, consider using a hardware IMEI switcher board or a software-defined cellular stack like srsLTE, rather than tampering with production-grade modules.
: Frequent modification or using incorrect factory reset commands like AT+QPRTPARA=3 can potentially harm or "kill" the module's flash memory. IMEI change (repair) on GL.iNet MiFi (EC25 )