Mobile Network Operators (MNOs) rely on accurate IMEI data to manage bandwidth and ensure device safety on the network.
The terminal should now display the new 15-digit IMEI number you programmed in Step 3. Troubleshooting Common Errors
Note on Errors: If you receive ERROR , it is likely due to:
The ability to modify the IMEI via AT commands depends heavily on the specific firmware version installed on your Quectel EC25. Newer production firmware versions often lock these commands to comply with regulatory security standards. Prerequisites and Setup quectel ec25 change imei
Ensure you comply with all local laws and regulations before making any modifications. Prerequisites and Equipment Needed
You cannot simply type 15 random numbers. An IMEI is validated by the Luhn algorithm (Mod 10). If you write an invalid IMEI, the modem may accept it, but the cellular tower will reject the registration request (Location Update Reject).
Or hard-reboot the module by cycling the power or toggling the PERST# (Reset) pin. Step 6: Verify the Changes Mobile Network Operators (MNOs) rely on accurate IMEI
This guide provides a step-by-step walkthrough of how to safely change the IMEI on a Quectel EC25 module using standard AT commands. Prerequisites and Security Warnings
This article aims to be the definitive guide. We will cover you might need to change the IMEI, the legal and ethical boundaries , the technical prerequisites , and the exact step-by-step commands (using both standard and manufacturer-specific AT instructions).
Ensure you wrapped the 15-digit IMEI inside double quotation marks "" . Newer production firmware versions often lock these commands
Before making changes, verify you can communicate with the modem.
The standard method for modifying the IMEI on Quectel modules is the AT+EGMR command. This command is officially used to read or write EFS (Embedded File System) items. Quectel has never officially documented AT+EGMR for IMEI modification, nor does it support its use for that purpose. Nevertheless, it is widely known to work on many (but not all) variants.