In many countries, changing a device's IMEI to evade cellular blocks or spoof cellular identity on public commercial networks is illegal. Ensure you are performing this action in a controlled lab environment or for legitimate development purposes.
The new IMEI is written to the configuration space but will not be broadcast to the cellular network until the baseband stack completely reinitializes. To safely commit the changes and restart the module, execute: AT+CFUN=1,1 Use code with caution.
If you changed the IMEI to an arbitrary number (like 111111111111111 ), local cellular towers may reject the module's registration request because the number fails the Luhn Algorithm check or is flagged on an Equipment Identity Register (EIR) blacklist. Always ensure your test IMEIs use valid allocation prefixes (TAC). Share public link
Confirm that the returned 15-digit string matches the new IMEI you programmed in Step 4. Troubleshooting Common Errors 1. Terminal Returns "ERROR" quectel ec25 change imei
Quectel modules use a specific write command for the IMEI. Replace 123456789012345 with your target 15-digit number. AT+EGMR=1,7,"123456789012345" Expected Response 4. Save and Restart
The Quectel EC25 series is a family of LTE Cat 4 wireless communication modules widely used in Internet of Things (IoT) devices, automotive telematics, industrial routers, and portable hotspots. Each module is factory-assigned a unique International Mobile Equipment Identity (IMEI) number—a 15-digit code that serves as the device’s unique identifier on cellular networks. Under normal circumstances, the IMEI is permanent and non-changeable. However, advanced users, developers, and sometimes unauthorized individuals may seek to alter this identifier. This essay provides a detailed technical examination of why, how, and under what conditions the IMEI on a Quectel EC25 module can be changed, the commands involved, and the associated risks.
Before making changes, document the factory-assigned IMEI of the module: AT+GSN Use code with caution. Alternatively, you can use: AT+CGSN Use code with caution. In many countries, changing a device's IMEI to
There are two main ways to interact with the EC25's identity: using through a serial terminal or fastboot for deeper system recovery. 1. Using AT Commands (Recommended for Repair)
A Quectel EC25 module (e.g., EC25-A, EC25-E, EC25-V, etc.) mounted on a PCIe development board or connected via a USB-to-UART adapter.
: Modifying an IMEI can cause registration failures on cellular networks if the new ID does not match the expected device type (e.g., using a "phone" IMEI for a "modem" module). Hardware Safety To safely commit the changes and restart the
: Use a tool like minicom , PuTTY , or Quectel's QNavigator to connect to the modem's AT port.
The terminal should output the new 15-digit number you programmed in Step 4. Your Quectel EC25 will now present this new identity to cellular towers during network registration. Troubleshooting Common Errors
If the terminal outputs your newly specified 15-digit number, the change was successful. Troubleshooting Common Errors