Open QCOM or PuTTY. Connect to the AT COM port (e.g., COM5) at 115200 baud rate. Type:
AT
Expected response:
OK
Now check the current IMEI:
AT+CGSN=1
or
AT+GSN
The module will return its existing IMEI. quectel change imei install
| Error | Likely Cause | Solution |
|-------|--------------|----------|
| ERROR after AT+EGMR | Command disabled in firmware | Use QFirehose instead |
| QFirehose: No response from DIAG port | Wrong port or driver not installed | Reinstall Quectel drivers, reboot PC |
| Write failed: NV corruption | NV memory locked | Send AT+QNV=... to unlock (advanced) |
| Module not entering download mode | Wrong pin timing | Use hardware USB_BOOT method per datasheet |
| New IMEI shows as 0 or unknown | Write incomplete | Repeat process, ensure power stable |
This is not a standard "install" feature for end-users. Quectel does not provide a one-click installer to change IMEI. Instead, it is a low-level diagnostic command feature. Open QCOM or PuTTY
Report ID: SA-2023-QTM-IMEI Subject: Analysis of "Quectel Change IMEI Install" Procedures Classification: Security Advisory / Regulatory Compliance Warning Date: October 26, 2023