Quectel Change - Imei Install

Security Advisory Report: Quectel Module IMEI Modification

Report ID: SA-2023-QTM-IMEI Subject: Analysis of "Quectel Change IMEI Install" Procedures Classification: Security Advisory / Regulatory Compliance Warning Date: October 26, 2023

QFlash + NV Backup Method

1. Extract module's NV backup using QNvTool.
2. Modify IMEI in the NV file (hex edit or script).
3. Flash modified NV back using QFirmware or QFlash during module programming.

3. Legal and Regulatory Compliance

Steps to Change IMEI (Development/Lab Use)

1. Enter AT command mode

   AT
   

   Expected response: OK

2. Check current IMEI

   AT+GSN
   

   or

   AT+CGSN
   

3. Unlock IMEI writing (if required)
   Some modules require:

   AT+QPRTPARA=3
   

   or manufacturer-specific unlock command. quectel change imei install

4. Write new IMEI

   AT+EGMR=1,7,"NEW_IMEI"
   

   Example:

   AT+EGMR=1,7,"123456789012345"
   

   (Replace with a valid test IMEI within your allocated range) QFlash + NV Backup Method

5. Verify change
   Reboot the module:

   AT+CFUN=1,1
   

   Then check again:

   AT+CGSN
   

6. Lock IMEI write (if unlocked earlier)

   AT+QPRTPARA=0