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.

Quectel modules use a specific set of AT commands to write to the NVRAM. There are two primary methods depending on the firmware version and security level. Method A: The Standard Command

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

To make it truly permanent (without Quectel’s signing tool), you cannot. The module always retains a golden copy in write-once memory. AT+EGMR simply overlays it in the EFS. quectel ec25 change imei

AT+EGMR=1,7,"NEW_IMEI_15_DIGITS"

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).

For modules where AT+EGMR is disabled, advanced users sometimes resort to: If you need to change IMEIs regularly for

What do you get when sending the command?

for similar modules, but this often fails on the EC25 without specific firmware or manufacturer-unlocked states. Modem State

Press Enter. Type AT and press Enter. The module should respond with OK . Step 2: Backup and Verify Current Module Status Method A: The Standard Command The EC25 uses

Before running commands, understand the legitimate use cases:

The IMEI is a 15-digit unique identifier assigned to every mobile cellular device. It serves two primary purposes: identifying the device on a mobile network and acting as a mechanism for network operators to block stolen or lost devices. Carriers use the IMEI for authentication, provisioning, and security enforcement.

The changes will not usually take effect until the module's radio stack or the hardware itself is rebooted. AT+CFUN=1,1 Use code with caution. Copied to clipboard (This performs a full functional reset of the module) . Verify the new IMEI: Once the module re-initializes, run: AT+GSN Use code with caution. Copied to clipboard Check that the returned number matches your new entry. Troubleshooting

Before proceeding, it is critical to understand the legal status of altering an IMEI. In many jurisdictions worldwide—including the United States (under the Mobile Device Theft Prevention Act), the European Union, and various other countries—changing a device's IMEI is illegal or strictly regulated.