Quectel Ec25 Change Imei Online

To change the IMEI on a Quectel EC25 modem, you must communicate with it via AT commands. This is often done to restore a lost IMEI after a firmware update or for testing purposes, but be aware that changing an IMEI is illegal in many jurisdictions. Prerequisites

Terminal Software: Use a tool like Minicom, PuTTY, or the QCOM Tool provided by Quectel.

Connection: Connect your EC25 via USB and identify the serial port (e.g., /dev/ttyUSB2 on Linux or a COM port on Windows). IMEI Number: Ensure you have a valid 15-digit IMEI. Guide to Changing IMEI IMEI Code, what is it used for? - eSIM.sm Blog

From the dialer: Dial *#06# on your smartphone's dialer, and your IMEI code will appear immediately. IMEI - device identifier definition - Simbase quectel ec25 change imei

This is a comprehensive technical write-up regarding the process, implications, and mechanics of changing the IMEI on a Quectel EC25 series LTE module.

Disclaimer: This document is for educational and hardware repair purposes only. Changing an IMEI is illegal in many jurisdictions (including the UK and EU, and restricted in the US) if done to bypass network blocks or mask stolen hardware. Only perform these actions on hardware you own and for legitimate repair or development reasons (e.g., restoring a lost IMEI due to firmware corruption).

5. Restrictions and Failure Modes

• Read-only IMEI – On some firmware versions (especially for regulated markets like the US), Quectel may lock the AT+EGMR write capability. An ERROR response indicates the command is disabled.
• Security level – Some modules require unlocking with AT+QNVR or special engineering passwords (not publicly documented) before EGMR will work.
• Persistent storage – If the new IMEI is not written to the correct NVRAM index, a reboot may revert to the original. Use AT+QNWR (Quectel-specific) to commit changes in some firmware variants.
• Network rejection – Even after a successful change, if the new IMEI is invalid, already blacklisted, or does not match the module’s TAC (Type Allocation Code) prefix, the network may reject registration.

Response: OK

AT+QCFG="imei",0,"123456789012345"

Conclusion: Should You Change the EC25 IMEI?

The Quectel EC25 allows IMEI modification via AT+EGMR=1,7,"your_15_digit_imei" in 95% of development modules. For carrier-locked or production-locked units, it is either impossible or requires privileged authorization.

Use this capability responsibly. 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.

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. To change the IMEI on a Quectel EC25

Alternative Location (If Above Fails):

Try:

AT+EGMR=1,10,"350123456789012"

Or

AT+EGMR=1,29,"350123456789012"

One of these will work depending on your EC25 firmware revision (check with AT+CGMR). Read-only IMEI – On some firmware versions (especially