Quectel Change: Imei [repack]

Quectel IMEI Management: A Comprehensive Guide to Changing and Repairing IMEI

The International Mobile Equipment Identity (IMEI) is the unique 15-digit serial number assigned to every cellular device, including the high-performance modules manufactured by Quectel. While this number is typically permanent, certain technical scenarios—such as repairing a corrupted parameter partition or ensuring regional compliance—may require modifying it.

This guide explores the technical methods, risks, and legal implications associated with changing a Quectel IMEI. Understanding the Role of IMEI in Quectel Modules

For Quectel modules like the EC25, EG25-G, or RM500U, the IMEI serves as the primary identifier for network registration.

Network Access Control: Carriers use the IMEI to authorize devices on their network. An invalid or blacklisted IMEI can prevent a module from connecting.

Firmware Correlation: Many Quectel AT commands, such as AT+CGSN or AT+GSN, are used to query the IMEI from the module's non-volatile memory (NVRAM).

Device Identification: In some regions, certain "Phone" IMEI ranges may cause issues when used with industrial "Modem" modules, necessitating a change for better compatibility with local regulations. Technical Methods for Changing Quectel IMEI

Modifying the IMEI is not a standard feature documented in official manuals, as Quectel generally prohibits customers from rewriting these identifiers without an official agreement. However, technical communities have identified several functional methods. 1. Using AT Commands (The AT+EGMR Method)

The most common way to modify a Quectel IMEI is through the Extended General Message Result (AT+EGMR) command via a serial terminal like PuTTY, MobaXterm, or minicom. Query Current IMEI: AT+EGMR=0,7 Change IMEI: AT+EGMR=1,7,"YOUR_NEW_15_DIGIT_IMEI"

Important Note for Linux Users: If you are using a device like the PinePhone, you must stop the ModemManager service before sending these commands to prevent serial port conflicts. 2. Advanced Software Tools quectel change imei

For more complex repairs, professionals often use specialized software:

Qualcomm Product Support Tool (QPST): Since many Quectel modules are based on Qualcomm chipsets, QPST can be used to browse NVdata and modify IMEI files, though this typically requires specific manufacturer permissions.

DC Unlocker: This third-party tool is frequently used for verifying IMEI changes and rescanning modems to ensure the new identifier has been written correctly. IMEI modification on EG25G - Quectel Forums

Changing IMEI on Quectel Modules: A Comprehensive Guide

Introduction

Quectel is a leading provider of wireless communication modules and solutions. Their modules are widely used in various industries such as IoT, industrial automation, and smart cities. One common requirement when working with Quectel modules is changing the IMEI (International Mobile Equipment Identity) number. In this blog post, we will cover the basics of IMEI, why you might need to change it, and provide a step-by-step guide on how to change the IMEI on Quectel modules.

What is IMEI?

IMEI is a unique 15-digit serial number assigned to every mobile device, including cell phones, smartphones, and mobile modules. It is used to identify a device on a cellular network and is usually stored in the device's firmware.

Why Change IMEI on Quectel Modules?

There are several reasons why you might need to change the IMEI on a Quectel module:

  1. Regulatory requirements: In some countries, using a module with a pre-programmed IMEI number may not be allowed. Changing the IMEI number can help you comply with local regulations.
  2. Device identification: If you are using multiple Quectel modules in your application, changing the IMEI number can help you identify each device uniquely.
  3. Network operator requirements: Some network operators may require you to use a specific IMEI number or range of numbers for your devices.

How to Change IMEI on Quectel Modules

Changing the IMEI on Quectel modules involves modifying the module's firmware. The process may vary depending on the specific module model and firmware version you are using. Here is a general step-by-step guide:

Method 1: Using AT Commands

Quectel modules support AT commands, which allow you to control and configure the module. You can use the following AT commands to change the IMEI:

  1. Check current IMEI: AT+CGMI - This command returns the current IMEI number.
  2. Set new IMEI: AT+CGMI=<new_imei> - Replace <new_imei> with the new IMEI number you want to set.

Example:

AT+CGMI
357852104123456
AT+CGMI=357852104987654

Method 2: Using Quectel's QFlash Tool

QFlash is a software tool provided by Quectel for flashing and configuring their modules. You can use QFlash to change the IMEI number:

  1. Download and install QFlash: Get the QFlash tool from Quectel's website and install it on your computer.
  2. Connect the module: Connect the Quectel module to your computer using a USB cable or a serial cable.
  3. Launch QFlash: Open QFlash and select the module model and COM port.
  4. Modify IMEI: In the QFlash menu, navigate to "Parameter Setting" and select "IMEI Setting". Enter the new IMEI number and click "Apply".

Method 3: Using Firmware Modification Tools Quectel IMEI Management: A Comprehensive Guide to Changing

Some Quectel modules have specific firmware modification tools, such as the Quectel L35 and L76 series. These tools allow you to modify the firmware, including the IMEI number.

Conclusion

Changing the IMEI on Quectel modules is a relatively straightforward process, but it requires careful attention to the specific module model and firmware version you are using. Before attempting to change the IMEI, make sure you have a good understanding of the process and the potential risks involved. If you are unsure, consult the Quectel documentation or contact their technical support team for assistance.

Additional Resources

Disclaimer

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.

I understand you're looking for information about changing the IMEI on Quectel modules. However, I need to provide an important legal and ethical warning first:

Module-Specific Differences

| Quectel Series | Command Variation | |----------------|-------------------| | EC20/EC25 | AT+EGMR=1,7,"IMEI" | | BG96/MC60 | AT+QEGMR=1,7,"IMEI" | | BC95/BC66 (NB-IoT) | Limited support |

Part 2: The Legal Landscape – Is Changing a Quectel IMEI Illegal?

This is the most critical section. In the vast majority of countries, changing the IMEI of a cellular device is illegal unless explicitly authorized by law or the device manufacturer. Regulatory requirements : In some countries, using a

5.2 The "Gray Market"

While tutorials and software tools for "Quectel IMEI Change" circulate on developer forums and hacking communities, their usage exists in a legal gray area. Development and research into these mechanisms are permissible under certain exemptions (e.g., security research, interoperability testing), but the actual application of changing an IMEI for use on a public network is almost universally prohibited without OEM authorization.

6. Security and Operational Risks

2.2 Quectel Module Memory Map

Quectel modules use Qualcomm or ASR basebands. The IMEI is stored in: