If you are using a Linux-based system (like Mobian or OpenWrt), you must stop services that might lock the serial port, such as : systemctl stop ModemManager.service Use code with caution. 3. Write the New IMEI
While AT+EGMR is the most common, some users have referenced other commands in forum discussions, such as AT*MRD_IMEI=W (specific to ASR chips), but these are not standard for Quectel EC25. Stick to AT+EGMR .
Then recheck:
It is a powerful tool for hardware developers and network testers, but a dangerous weapon for fraudsters. Always adhere to local laws and carrier terms of service.
The most common method for modifying the EC25 IMEI is through the AT+EGMR command, which is an engineering-level command often used to "write" to protected memory. quectel ec25 change imei
: Any modification of the IMEI listed on the warranty card immediately voids the manufacturer's warranty. EFS Corruption
The module will respond with the current IMEI. Note this down as a backup.
What (Windows or Linux) are you using to connect?
To set IMEI for (usually main SIM):
Note: If the command returns ERROR , your firmware might use alternative index numbers or a different command structure. Method 2: Alternative EGMR Syntax
Set the speed/baud rate to (default for Quectel modules). Click Open or Connect . Step 3: Verify Current Module Status
AT+CFUN=1,1
AT+EGMR=1,7,"new_imei_here"
This article provides a technical overview of how to change the IMEI on a Quectel EC25 module using AT commands, the prerequisites for doing so, and the legal implications you must consider. Legal and Ethical Disclaimer
AT+QPRTPARA=1
One reseller of EC25-based routers noted a broader concern: “Changing IMEI goes against a lot of rules in the industry… if Quectel has left the device unlocked to that level – that’s bad news for them – carriers could just revoke the entire bunch of them”. This highlights that IMEI modification is not just a legal issue but also a threat to the commercial trustworthiness of the entire product line.
Open your serial terminal software and connect to the (not the DM or NMEA ports). Baud Rate: Typically 115200 bps (or auto-baud). Data Bits: 8 Parity: None Stop Bits: 1 If you are using a Linux-based system (like