Quectel Change Imei Install |link| -

Modifying the International Mobile Equipment Identity (IMEI) of a Quectel module is typically done for repair purposes, such as restoring a factory IMEI after a firmware corruption. While Quectel does not officially support or provide commands for customers to modify IMEIs, the industry-standard AT+EGMR command is widely used by developers for this purpose. Prerequisites and Installation

To interact with your Quectel module, you must first install the necessary drivers and communication tools on your computer.

Install USB Drivers: Download and install the Quectel USB drivers for your specific operating system (Windows/Linux) to ensure your computer can recognize the module's serial ports.

Identify the AT Port: Once installed, open Device Manager (Windows) to identify the COM port labeled as the Quectel USB AT Port.

Serial Terminal Software: Install a serial port tool like PuTTY or MobaXterm to send commands to the module.

Settings: 115200 baud rate, 8 data bits, 1 stop bit, no parity (115200n81). Guide to Changing IMEI via AT Commands

Follow these steps to read or write a new IMEI number to your Quectel module.

Query the Current IMEI: Open your serial terminal and enter the following command to see the current 15-digit IMEI: AT+EGMR=0,7 Alternatively, AT+CGSN can be used to read the number.

Write the New IMEI: Use the write variation of the command, replacing the digits below with your target 15-digit IMEI: AT+EGMR=1,7,"123456789012345" Verify and Save: If successful, the module will respond with OK. Restart the module to apply the changes. Confirm the change by running AT+EGMR=0,7 or AT+CGSN again. Critical Considerations

What Is an IMEI Lock and How Does It Work? A Complete Guide - floLIVE

This report outlines the technical procedures, software requirements, and regulatory implications for modifying the International Mobile Equipment Identity (IMEI) on Quectel modules. 📋 Executive Summary

Modifying an IMEI (often termed "repairing" or "writing") on Quectel modules is primarily done using AT commands or proprietary Quectel tools like QFlash. While technically feasible for most LTE and 5G modules (e.g., EC25, EG25-G, EP06), the process is subject to strict legal restrictions in many jurisdictions and may void manufacturer warranties. 🛠️ Technical Procedure: AT Command Method

The most common method involves sending specific strings to the module's AT Port via a serial terminal (e.g., PuTTY, QCOM, or Minicom). 1. Identify the Correct Port Windows: Check Device Manager for "Quectel USB AT Port". Linux: Typically maps to /dev/ttyUSB2 or /dev/ttyUSB3. 2. Verify Current IMEI

Before making changes, document the original factory identifier: Command: AT+GSN or AT+CGSN=1. Response: Returns the current 15-digit IMEI. 3. Apply New IMEI Most modern Quectel modules use the +EGMR command. Command Structure: AT+EGMR=1,7,"[15-digit_IMEI]" Action: Open the serial tool at 115200 baud. Type the command with the new 15-digit number in quotes. Receive response OK.

Reboot: Execute AT+CFUN=1,1 to restart the module and apply the change. 💿 Software & Driver Installation

To interact with the module, specific drivers and tools must be installed on the host machine. Required Drivers quectel change imei install

Quectel USB Drivers: Necessary for the OS to recognize the virtual COM ports (AT, DM, NMEA, Modem).

QFlash: Quectel’s official firmware upgrade tool, which can sometimes be used for deeper configuration or repairing corrupted NVRAM data. IMEI modification on EG25G - Quectel Forums

While Quectel does not officially support or provide commands for users to change the International Mobile Equipment Identity (IMEI) for security and legal reasons, certain technical methods are frequently discussed in developer communities for research and repair purposes ⚠️ Important Disclaimer Legal Risks:

In many jurisdictions, altering an IMEI is illegal and can lead to criminal charges. Warranty & Security:

Modifying the IMEI will void your warranty and may cause the device to be blacklisted by cellular carriers. Hardware Damage:

Improper commands or firmware mismatches can permanently "brick" the modem. Quectel Forums Technical Prerequisites

To interact with a Quectel module (such as the EC25 or EG25-G) for low-level configuration: Hardware Connection:

The modem must be connected via a serial port, USB interface, or integrated into a device like a PinePhone. Terminal Software: Use a tool like QNavigator

, or a standard Serial Monitor (e.g., PuTTY) set to the appropriate baud rate (typically 115200). System Access:

On Linux-based systems, you may need to stop background services that lock the serial port: systemctl stop ModemManager.service Use code with caution. Copied to clipboard General AT Command Procedure

The most commonly cited method involves the Extended Modem Reset (EGMR) command.

Over-the-Air Firmware Updates for Constrained NB-IoT Devices

The International Mobile Equipment Identity (IMEI) is a unique 15-digit code used to identify cellular devices on a network. For Quectel modules, changing the IMEI is often necessary for legitimate hardware repairs or identity restoration after data corruption.

Below is a detailed guide on the installation and technical process for modifying the IMEI on a Quectel module using AT commands. 1. Prerequisites and Installation

To interact with a Quectel module, you must first install the necessary drivers and software on your host machine. Power it back on

USB Driver Installation: Download and install the official Quectel LTE Windows USB Driver. Once installed, connect the module to your computer via USB. Open the Device Manager to verify that several serial ports have appeared, specifically the Quectel USB AT Port.

Serial Port Tool: Use a serial communication tool such as PuTTY, MobaXterm, or QCOM (Quectel's proprietary tool) to send commands to the module.

Port Settings: Configure your serial tool to the following default settings: Baud Rate: 115200 Data Bits: 8 Parity: None Stop Bits: 1 2. Verifying Current IMEI

Before attempting a change, verify the module's current identification to ensure it is communicating correctly. Open the serial port corresponding to the AT Port. Send the following command to query the current IMEI: AT+CGSN Use code with caution.

Alternatively, use AT+EGMR=0,7 to retrieve the IMEI string specifically.

Record the current number as a backup in case you need to restore the original factory settings. 3. How to Change the IMEI (Step-by-Step)

Quectel modules utilize specific AT commands for identity management. The most common command for this task is AT+EGMR.

Stop Conflicting Services: If you are using Linux (e.g., PinePhone), stop the ModemManager service first to prevent it from locking the serial port: systemctl stop ModemManager.service ``` Use code with caution.

Execute the Change Command: In your serial terminal, enter the command below, replacing the placeholder with your desired 15-digit number: AT+EGMR=1,7,"YOUR_NEW_15_DIGIT_IMEI" ``` Use code with caution.

Confirm the Result: If successful, the module will return an OK response.

Verify the New IMEI: Run AT+CGSN again to confirm the module is now broadcasting the new identification.

Reboot: Restart the module to ensure the changes are finalized across all internal systems. 4. Troubleshooting and Firmware Issues

If the command fails or returns a CME ERROR, consider the following: How to get Quectel standard firmware - Technical Subjects

3. Legal and Regulatory Compliance

2.1. The IMEI Standard

The IMEI is a unique 15-digit number used to identify valid mobile equipment on a GSM, UMTS, or LTE network. Its primary function is to identify the hardware device independently of the SIM card.

Part 5: Verifying the New IMEI Installation

After the procedure, reset the module:

AT+QPOWD=1

Power it back on. Reconnect to the AT port and run:

AT+CGSN=1

The module must now report the new IMEI. Also check with:

AT+CGSN

(returns IMEI without formatting)

Verification with network: Insert a SIM card and try to register on the network:

AT+CREG?

Response should show 1,1 or 1,5 (registered).

Some carriers may reject an invalid IMEI – ensure your new IMEI has a valid TAC (first 8 digits) and correct checksum.

Hardware Required:

1. Executive Summary

This report addresses the technical inquiry regarding the modification (changing) of the International Mobile Equipment Identity (IMEI) on Quectel cellular modules. While the technical capability to alter IMEI numbers on such devices exists via AT commands or proprietary tools, this practice is heavily restricted by hardware design (Write-Once fuses) and is illegal in most jurisdictions.

This document outlines the technical background, legal implications, and security risks associated with IMEI modification for Quectel modules.

Prerequisites

Phase 2: Using QFirehose to Change IMEI

QFirehose is a command-line tool that communicates via the diagnostic port.

  1. Locate the Diagnostic Port in Device Manager (e.g., COM6).

  2. Open Command Prompt as Administrator and navigate to the QFirehose folder.

  3. Execute:

    QFirehose.exe -p COM6 -f change_imei.xml

    The change_imei.xml should contain:

    <?xml version="1.0" encoding="UTF-8"?>
<data>
 <changeimei>
    <imei>123456789012345</imei>
 </changeimei>
</data>

    Replace the IMEI with your desired 15-digit number.

  4. If successful, you’ll see SUCCESS message. If not, you may need to use the QLP tool instead. The module must now report the new IMEI

Important Warnings (Legal & Technical)

⚠️ Legal: Changing IMEI is illegal in many countries (e.g., USA, EU, China, India) unless you are the manufacturer or have explicit permission. It can be considered a felony (device tampering).

⚠️ Technical:

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