A Quectel forum user reported persistent failure with the AT+EGMR command on an EG25-G module (software version EG25GGCR07A02M1G). After troubleshooting, the user discovered a critical condition: "the AT command is successful only when the modem interface is in a certain condition — and the interface is not up, or not fully up" . The solution required disconnecting the WAN Ethernet cable and ensuring the modem was active without competing network interfaces.
: Some countries require specific IMEI prefixes for IoT devices rather than phone prefixes.
Device management platforms, warranty systems, and law enforcement tracking rely on fixed IMEIs. Change one, and you orphan your device from support.
Power cycle the module or execute a soft reset using AT+CFUN=1,1 to force the modem to reload its profile and register to the network with the newly written identity. ⚠️ Troubleshooting and Common Errors
Where:
A specialized tool designed for backup, restore, and calibration of NVRAM/QCN files, which contain the device's identity and RF calibration data. Technical Troubleshooting and Limitations
The information provided in this blog post is for general purposes only and may not be applicable to your specific use case. Quectel and its affiliates disclaim any liability for any errors or damages resulting from the use of the information provided.
Quectel modules utilize specific AT command parameters within the engineering command set to interact with the device's non-volatile memory (NVRAM) or Qualcomm Configuration (QCN) layers. AT Command Syntax Expected Module Response AT+EGMR=0,7 +EGMR: "15_DIGIT_NUMBER" OK Write/Modify IMEI AT+EGMR=1,7,"15_DIGIT_NUMBER" OK (or +CME ERROR if locked) Standard Identity Query AT+CGSN 15_DIGIT_NUMBER 🛠️ Step-by-Step Implementation via Serial Interface
Quectel modules utilize standard and proprietary Hayes AT commands for configuration. Interacting with the IMEI requires a serial connection to the module's AT command interface via tools like QCOM, PuTTY, or Minicom. 1. Reading the Current IMEI quectel change imei
For compliance issues (e.g., "Phone IMEI" vs. "Modem IMEI"), Quectel may provide official configuration assistance. One forum user noted: "For your request, if you can provide more information, for example, your location, email address, the change purpose of IMEI" — Quectel may work with legitimate cases.
Modifying the IMEI of a communication module is illegal in many countries, including the United States. It can violate telecommunications regulations and carrier terms of service. This article is for educational and technical research purposes only. Furthermore, changing an IMEI can render your module useless, causing it to fail to register with cellular networks. 1. Understanding Quectel IMEI and AT Commands
The International Mobile Equipment Identity (IMEI) is a assigned to every cellular device worldwide. For developers and engineers working with Quectel modules (such as the popular EC25, EG25-G, BG95, and RM520N families), questions about IMEI modification inevitably arise. Whether prompted by device repair, regulatory compliance, or technical experimentation, the topic of "Quectel change IMEI" demands careful examination.
This paper is for educational and informational purposes only. The author does not condone or encourage the illegal alteration of IMEI numbers. Tampering with device identifiers is a criminal offense in many jurisdictions. A Quectel forum user reported persistent failure with
Changing the IMEI on a Quectel module is possible using AT commands like AT+EGMR , but it is legally sensitive and technically risky. Quectel does not support or recommend this operation, and newer firmware versions are increasingly locking down this capability.
Using AT+EGMR=1,7,"new_imei" can write a new IMEI to the module’s NVRAM. Some developers do it for prototyping — but shipping a product with a changed IMEI is a felony in many countries (wireless fraud).
Modifying the IMEI on a Quectel module generally involves interacting with the baseband processor via serial interfaces (UART/USB). The complexity varies depending on the module series (e.g., BG96, EC25, M10).