In many scenarios, software tools provided by the manufacturer or third-party developers are used to simplify this interaction. These tools send hexadecimal strings to the module's firmware, bypassing standard user-level restrictions to update the identification register. Legal and Ethical Implications
Connect to the module via your terminal software and check the current IMEI and firmware version to ensure proper communication. Command to check IMEI: AT+GSN Use code with caution. (The module will return the current 15-digit IMEI number). Command to check firmware version: ATI Use code with caution. Step 2: Enter the Secret Command Mode
According to Quectel Forums , Quectel does not support or encourage modifying the IMEI, and many modern firmware versions have restricted this command completely. 4. Risks Associated with Changing EC25 IMEI
A reboot ensures the new settings are fully applied. quectel ec25 change imei
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Changing the IMEI on a Quectel EC25 is a straightforward technical task for those familiar with AT commands, but it carries significant weight. While it serves as a vital tool for hardware recovery and specialized development, it must be approached with a strict adherence to local laws and a clear understanding of the security implications.
Quectel modules use specific, often undocumented or engineering-level AT commands to alter the IMEI in the device's non-volatile memory (NVRAM). The command structure depends heavily on the firmware version running on your EC25. Method 1: Using the Standard Quectel Production Command In many scenarios, software tools provided by the
ls /dev/ttyUSB* # Typically ttyUSB2 is the AT port sudo screen /dev/ttyUSB2 115200
Engineers often use the AT+EGMR command, which is a standard interface for managing mobile equipment identifiers. For example, the command AT+EGMR=1,7,"[NEW_IMEI]" is frequently cited in technical documentation as the method to write a new identifier to the module's firmware. Legitimate Use Cases
After changing, it's a good practice to verify the IMEI with: Command to check IMEI: AT+GSN Use code with caution
Quectel modules use a specific command to write the primary IMEI. Replace 123456789012345 with your target 15-digit IMEI. Type the following command and press Enter: AT+EGMR=1,7,"123456789012345" Use code with caution. AT+EGMR : Enhanced General Modern Commands. 1 : Indicates a "write" action.
Read the IMEI again to confirm the modification was persistent.
The module will respond with the current IMEI. Note this down as a backup.
: A common technique to "revive" a corrupted module is to obtain a QCN file from a functional, identical modem. You can then edit the IMEI and serial number within that QCN file to match the target device. This modified file is then flashed to the broken module using a tool like QPST (Qualcomm Product Support Tool) or QFirehose . Users on Quectel forums have had success reviving their modems by receiving a QCN dump from a working unit and uploading it to their own.
Always keep a backup of your original IMEI. If you are a genuine developer working with Quectel EC25 modules, reach out to Quectel’s FAE team for the official IMEI rewriting tool—it’s safer and legally compliant.