The AT+EGMR command writes to the NV memory, so the change should survive factory resets ( AT&F ) or firmware upgrades. However, if you ever send AT+QPRTPARA=3 followed by AT+QURIPARA=3 , the IMEI will revert to the original masked ROM value.
Quectel provides an extended proprietary command structure via AT+EGMR to write an alternate IMEI into the device's secondary configuration sector. AT+EGMR=1,7," " Use code with caution. Example Execution
Changing the IMEI (International Mobile Equipment Identity) on a Quectel EC25 module is technically possible via AT commands, though it is and often legally regulated. Quectel generally forbids unauthorized modifications to the IMEI and does not provide these commands in standard documentation. Technical Methods
This is the most common error when using AT+EGMR .
While some modules update immediately, it is best practice to reset the module to ensure the change is written to the non-volatile memory (NVRAM). AT+CFUN=1,1 (This performs a full restart of the module). 5. Verify the Change quectel ec25 change imei
Changing the IMEI on a Quectel EC25 Module: A Technical Overview
Do not waste time on AT+EGMR . You need the commands.
Some industrial modules require entering an engineering or manufacturing password via an AT+QNVW or AT+QFASTBOOT sequence before unlocking the registers.
The is a popular LTE Cat 4 module widely used in Internet of Things (IoT), industrial routers, and telematics applications. Its popularity stems from its reliability, wide range of network support (LTE-FDD, LTE-TDD, DC-HSDPA, WCDMA, EDGE, GPRS), and excellent power management. The AT+EGMR command writes to the NV memory,
A Quectel EC25 module connected via USB (Mini PCIe or M.2 adapter).
AT+CEREG? # Should return 1 (registered) or 5 (roaming)
The module will return a 15-digit number representing your current IMEI. Step 3: Enter the Modification Command
If you are running a highly restrictive production firmware version, you may need to use the Quectel QFlash tool to temporarily downgrade to an older engineering firmware revision that supports the AT+EGMR command. 2. The Command Returns "OK" but IMEI Reverts After Reboot AT+EGMR=1,7," " Use code with caution
The terminal should output the new 15-digit number you programmed in Step 4. Your Quectel EC25 will now present this new identity to cellular towers during network registration. Troubleshooting Common Errors
: On your Linux system, stop any service that might be controlling the modem:
AT+QCFG="imei",0,"123456789012345"
: Any modification of the IMEI listed on the warranty card immediately voids the manufacturer's warranty. EFS Corruption