Quectel Ec25 Change Imei Link (2024)

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).

IMEI Reverts on Reboot

If the IMEI changes but reverts after a power cycle: quectel ec25 change imei

• You likely wrote to a temporary cache variable in RAM.
• You must ensure the write command is committing to NVRAM.
• In QPST, ensure the file is uploaded and synced correctly.

6. Troubleshooting & Common Pitfalls

Part 10: Best Practices & Final Thoughts

If you have read this far searching for "quectel ec25 change imei", here is the executive summary:

• Do not change the IMEI on a live production device unless you have written approval from your mobile carrier.
• Always backup your original NV memory using AT+QNWR commands before any write operation.
• Use the exact 15-digit format – no spaces, no dashes. Valid digits: 0-9.
• Test on a development EC25 first – never experiment on a module deployed in a critical system.

For 99% of users, the factory IMEI is perfectly fine. The remaining 1% who legitimately need to change it now have a reliable, documented procedure. This is a comprehensive technical write-up regarding the

Response: OK

AT+CFUN=1 # Re-enable RF

3. Method A: The AT Command Interface (Standard Method)

This is the cleanest method provided by Quectel. It uses the standard Hayes command set extended by Quectel. IMEI Reverts on Reboot If the IMEI changes

Restoring Original IMEI

Follow same steps with original IMEI from module label.
Keep a record of both old and new IMEI – without the original, you cannot certify or return the module.

Step 5: Verify Success

Perform a full power cycle (remove VBAT for 30 seconds). Then re-query:

AT+CGSN

The new IMEI must appear.

Step 1: Connect to the EC25 via AT Commands

The EC25 uses a standard Hayes command set over its serial ports.