AT+CGSN=1 The output should now display your new IMEI. 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.
OK Try:
But if you receive an error like +CME ERROR: operation not allowed , you must first send: quectel ec25 change imei
If you need to change IMEIs regularly for legitimate testing, consider using a hardware IMEI switcher board or a software-defined cellular stack like srsLTE, rather than tampering with production-grade modules. | Action | AT Command | |--------|-------------| | Check IMEI | AT+CGSN=1 | | Write new IMEI (standard) | AT+EGMR=1,7,"350123456789012" | | Write IMEI (alternate) | AT+EGMR=1,10,"350123456789012" | | Soft reboot module | AT+CFUN=1,1 | | Unlock IMEI zone | AT+QPRTPARA=1 | | Factory reset (doesn’t clear IMEI) | AT&F | Final word: Always keep a backup of your original IMEI. If you are a genuine developer working with Quectel EC25 modules, reach out to Quectel’s FAE team for the official IMEI rewriting tool—it’s safer and legally compliant. AT+CGSN=1 The output should now display your new IMEI
Make a note of this number. You may need to restore it later. Some EC25 modules ship with IMEI write-protection enabled. To disable it temporarily, you may need the "IMEI unlock password" from Quectel (usually available only to verified OEM customers). However, for most standard EC25 modules: OK Try: But if you receive an error
It is a powerful tool for hardware developers and network testers, but a dangerous weapon for fraudsters. Always adhere to local laws and carrier terms of service.
AT+CGSN (Returns IMEI without label.)