Quectel Change Imei Install
Before attempting to change or install a new IMEI, gather the following:
Some Quectel modules allow a simpler command (though less common in newer modules):
AT+EGMR=1,7,"new_imei"
Example:
AT+EGMR=1,7,"123456789012345"
Response should be OK. Then reset:
AT+CFUN=1,1
Important: The AT+EGMR method is often disabled in recent firmware. If you get ERROR, you must use QFirehose or QDM. quectel change imei install
QFirehose is a command-line tool that communicates via the diagnostic port.
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 modules (e.g., EC20, EC25, BG96) store the IMEI in a Non-Volatile Memory (NVRAM) partition.
The IMEI is a unique 15-digit number used to identify valid mobile equipment on a GSM, UMTS, or LTE network. Its primary function is to identify the hardware device independently of the SIM card. Before attempting to change or install a new
| 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 report addresses the technical inquiry regarding the modification (changing) of the International Mobile Equipment Identity (IMEI) on Quectel cellular modules. While the technical capability to alter IMEI numbers on such devices exists via AT commands or proprietary tools, this practice is heavily restricted by hardware design (Write-Once fuses) and is illegal in most jurisdictions.
This document outlines the technical background, legal implications, and security risks associated with IMEI modification for Quectel modules.