Changing an IMEI is illegal in many jurisdictions unless you are the authorized manufacturer or have legal rights for repair. Unauthorized modification can lead to your device being blacklisted by carriers, as it compromises the integrity of network security. Prerequisites for IMEI Modification To interact with the Quectel EC25, you need:
AT+EGMR=0,1,"password"
If you’re considering an IMEI change for a legitimate project, explore these safer options first:
This command displays the module’s IMEI.
The default baud rate for Quectel modules is typically 115200 with 8 data bits, no parity, and 1 stop bit (8N1). Step-by-Step Procedure to Change the IMEI quectel ec25 change imei
Quectel officially forbids rewriting the IMEI at will and typically requires customers to sign a legal agreement before providing the necessary commands or tools.
You can use the standard AT+CGSN or AT+GSN commands.
Follow same steps with original IMEI from module label. of both old and new IMEI – without the original, you cannot certify or return the module.
Some older Quectel firmwares require a checksum digit calculation (Luhn algorithm), but the module usually auto-generates the checksum if the first 14 digits are valid. However, it is best practice to generate a valid IMEI with the Luhn checksum included. Changing an IMEI is illegal in many jurisdictions
Note: If the command returns ERROR , your firmware might use alternative index numbers or a different command structure. Method 2: Alternative EGMR Syntax
Carriers use IMEIs to identify device types. An incorrect or modified IMEI can lead to network registration failure, blacklisting, or service revocation. Required Tools and Setup
Quectel EC25 , changing the International Mobile Equipment Identity (IMEI) is generally strictly forbidden
Ensure the Quectel USB Serial drivers are installed on your Windows or Linux host. Terminal Software: Windows: QCOM, Putty, or Tera Term. Linux: minicom or screen . Step 1: Establish Communication The default baud rate for Quectel modules is
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.
It is crucial to note that the AT+EGMR command directly modifies the Non-Volatile Memory (NV) items on the modem's EFS (Embedded File System). This change persists across power cycles and reboots.
The most direct method is using the AT+EGMR command via a serial terminal (like PuTTY or MobaXterm ).
AT+GSN