Quectel Ec25 Change Imei

Changing the IMEI (International Mobile Equipment Identity) is illegal in many countries unless you are the original manufacturer or have explicit legal authorization (e.g., for testing certified devices in a lab).
This content is for educational purposes only – e.g., restoring a factory-assigned IMEI after firmware corruption, or revalidating test modules in a shielded environment. Misuse may violate laws like the US Criminal Code § 1029, EU Directive 2002/21/EC, or similar regulations worldwide.

Quectel hides the IMEI write function in the AT+QCFG (Configuration) namespace. However, the module requires a special passcode and SIM network presence to authorize the change.

To understand how to change the IMEI, one must understand where it is stored. The Quectel EC25 is a LTE Cat 4 module commonly used in IoT devices, industrial gateways, and consumer routers (like those from GL.iNet or TP-Link).

The module runs a proprietary real-time operating system (RTOS) on a Qualcomm baseband processor (MDM9x07 platform). The IMEI is not stored in the user-accessible file system (like /etc/config), but in the NVRAM (Non-Volatile Memory) or QCN (Qualcomm Calibration) partition.

Specifically, the IMEI resides in a section of the NVRAM managed by the Qualcomm EFS (Encrypted File System) layer. quectel ec25 change imei

The Quectel EC25 series is a family of LTE Cat 4 wireless communication modules widely used in Internet of Things (IoT) devices, automotive telematics, industrial routers, and portable hotspots. Each module is factory-assigned a unique International Mobile Equipment Identity (IMEI) number—a 15-digit code that serves as the device’s unique identifier on cellular networks. Under normal circumstances, the IMEI is permanent and non-changeable. However, advanced users, developers, and sometimes unauthorized individuals may seek to alter this identifier. This essay provides a detailed technical examination of why, how, and under what conditions the IMEI on a Quectel EC25 module can be changed, the commands involved, and the associated risks.

If you dislike AT commands, Quectel provides a PC tool called QCOM (Quectel Communication Tool).

QCOM internally sends the same AT+EGMR commands.

The Quectel EC25 is one of the most popular LTE Cat 4 modules in the IoT world. It supports multiple frequency bands (EC25-E, EC25-A, EC25-AU, EC25-V, etc.) and interfaces (USB, UART, PCIe). Like all cellular modems, it has a unique 15-digit IMEI burned into its firmware. Quectel hides the IMEI write function in the

However, developers and integrators sometimes need to modify this IMEI for:

By default, Quectel modules allow IMEI reprogramming via standard AT commands—but only if the module is not IMEI-locked by the manufacturer or a carrier.

Always check the existing IMEI before making changes. Use: