No Response/Timeout: Double-check that you are communicating over the and not the DM or NMEA ports, which do not accept standard AT commands. If you are working on a specific deployment, let me know:
To enable IMEI change functionality on a Quectel module, you need to install the proper and use terminal software .
Quectel Wireless Solutions is a leading global supplier of IoT and automotive modules, with a vast portfolio of cellular, Wi-Fi, and GNSS modules. Devices equipped with Quectel modems—such as the widely used EG25-G, BG95, or 5G RM500Q series—are foundational in industrial IoT, routers, and telematics.
Select the corresponding to the Quectel USB AT Port . Set the speed to 115200 baud (default). Type AT and press Enter. The module should respond with OK . 2. Query Current IMEI
Ensure the module receives adequate, stable power. Low power can lead to communication drops and firmware corruption during the write process. 2. Software and Drivers quectel change imei install
Method B: NV Item Flashing via QPST (Advanced Qualcomm Calibration)
The NVRAM checksum may be invalid, or the new identity code contains an invalid Type Allocation Code (TAC) or incorrect check-digit (the 15th digit computed via the Luhn algorithm). Ensure your value satisfies standard Luhn validation.
If the virtual COM ports disappear after modifying settings, use the hardware PERST# (Reset) pin on the development board to force a factory reset, or reinstall the Quectel USB drivers. Summary Checklist for Engineers Command / Tool Expected Outcome Read Current Identity AT+CGSN Displays active 15-digit IMEI Write New Identity AT+EGMR=1,7,"..." Returns OK Apply Changes AT+CFUN=1,1 Module reboots and reloads NVRAM Verify Network Status AT+CREG? or AT+CGREG? Returns 0,1 (Registered on home network)
Improper commands or firmware mismatches can permanently "brick" the modem. Quectel Forums Technical Prerequisites Devices equipped with Quectel modems—such as the widely
AT+QPRTPARA=3
Professional engineers often use the Quectel NV Item Manager to back up the QCN file. If an IMEI "install" fails, the QCN can be edited and reflown back into the module using QPST.
Once the drivers are installed, follow these steps to interface with your module. 1. Connect to the Modem Open your serial tool (e.g., MobaXterm).
The ability to freely change IMEIs on Quectel modules is a dwindling practice. As legal pressures increase and anti-fraud measures tighten, manufacturers like Quectel are actively closing these loopholes in their firmware. The future points toward where identity is managed securely by the carrier, and toward certified hardware where the IMEI is a hardware-trusted value. The methods described in this article are based on historical and current community knowledge, but they are not guaranteed to work on newer modules or future firmware releases. Type AT and press Enter
Configure your serial tool with the following universal parameters:
Changing the IMEI on a Quectel module requires technical expertise and caution. Before attempting to change the IMEI, ensure you understand the process and potential implications. It's also essential to consult the module's documentation and Quectel's support resources for specific guidance.
Quectel modules utilize specific AT commands for identity management. The most common command for this task is AT+EGMR .