Quectel Ec25 Change Imei «2025»
After extensive testing across EC25E, EC25A, EC25V, and EC25-MiniPCIe variants, only two practical methods exist. Neither is officially documented by Quectel.
The IMEI is a 15-digit unique identifier for cellular hardware. Mobile networks use it to authorize devices, block stolen units, or enforce data plan limits.
The Quectel EC25 (variants: EC25-A, EC25-E, EC25-AU, EC25-V, etc.) comes pre-programmed with a factory IMEI. Usually, this is printed on a sticker on the module’s shielding. By default, this IMEI is read-only via standard AT+CGSN commands.
However, OEMs (Original Equipment Manufacturers) often need to change the IMEI to match their company’s allocated range or to replace a faulty module in the field without updating network registries.
| Action | AT Command |
|--------|-------------|
| Check IMEI | AT+CGSN=1 |
| Write new IMEI (standard) | AT+EGMR=1,7,"350123456789012" |
| Write IMEI (alternate) | AT+EGMR=1,10,"350123456789012" |
| Soft reboot module | AT+CFUN=1,1 |
| Unlock IMEI zone | AT+QPRTPARA=1 |
| Factory reset (doesn’t clear IMEI) | AT&F |
Final word: Always keep a backup of your original IMEI. If you are a genuine developer working with Quectel EC25 modules, reach out to Quectel’s FAE team for the official IMEI rewriting tool—it’s safer and legally compliant.
Changing the IMEI (International Mobile Equipment Identity) of a Quectel EC25 module is a procedure typically used by developers for testing, debugging, or restoring a device to its original state if the NVRAM has been corrupted. Important Legal & Ethical Notice:
Legality: In many jurisdictions (including the US, UK, and EU), changing a device's IMEI is illegal or strictly regulated to prevent theft and fraud.
Risk: Writing to the NVRAM/modem partitions carries a risk of "bricking" the device. quectel ec25 change imei
Purpose: This guide is for educational and authorized diagnostic purposes only. Prerequisites
Hardware: A Quectel EC25 module connected via USB (Mini PCIe or M.2 adapter).
Drivers: Ensure the Quectel USB Serial drivers are installed on your Windows or Linux host. Terminal Software: Windows: QCOM, Putty, or Tera Term. Linux: minicom or screen. Step 1: Establish Communication
Connect to the module's AT Port (usually labeled as "Quectel USB AT Port"). The default baud rate is typically 115200. Test the connection by typing: AT Use code with caution. Copied to clipboard The module should respond with OK. Step 2: Verify Current IMEI Before making changes, document your current identity: AT+GSN Use code with caution. Copied to clipboard Response:
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
Most EC25 modules support the AT+EGMR command to modify the IMEI. Command Syntax:AT+EGMR=1,7," Example: AT+EGMR=1,7,"354123456789012" Use code with caution. Copied to clipboard
Verification:If the response is OK, the command was accepted. Method B: Quectel Production Commands (Advanced)
Some specific firmware builds require entering a "Production Mode" or using a proprietary write command: AT+QCPWRITEIMEI="354123456789012" Use code with caution. Copied to clipboard Step 4: Finalizing and Verification After extensive testing across EC25E, EC25A, EC25V, and
The changes will not usually take effect until the module's radio stack or the hardware itself is rebooted. Reset the module: 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
ERROR Response: If you receive an ERROR, the command may be locked. Some firmware versions require a security password (usually provided to OEMs by Quectel) via AT+QPRTPW.
Read-Only: If the IMEI reverts after a power cycle, the module may have a hardware write-protect enabled or a customized firmware that pulls the IMEI from a secondary OTP (One-Time Programmable) memory.
Are you performing this for testing on a private cellular network, or are you trying to recover a corrupted module?
Modifying the International Mobile Equipment Identity (IMEI) of a Quectel EC25 module is a sensitive procedure typically reserved for legitimate device repair or manufacturing restoration. While the process is not documented in standard AT command manuals, it can be achieved using specific engineering commands. Critical Warning: Legality and Compliance
Changing an IMEI is illegal in many jurisdictions unless you are the authorized manufacturer or have legal rights for repair. Unauthorized modification can lead to your device being blacklisted by carriers, as it compromises the integrity of network security. Proceed at your own risk. Prerequisites for IMEI Modification To interact with the Quectel EC25, you need:
Hardware Connection: The module must be connected to a PC via USB or a serial interface (e.g., using a mini-PCIe to USB adapter).
Drivers: Ensure the Quectel USB AT Port drivers are installed. | Action | AT Command | |--------|-------------| |
Terminal Software: Tools like Minicom, PuTTY, or QNavigator are required to send AT commands. Step-by-Step: Changing IMEI via AT Commands
The most common method for modifying the EC25 IMEI is through the AT+EGMR command, which is an engineering-level command often used to "write" to protected memory. 1. Establish Communication
Before making changes, verify you can communicate with the modem.
Open your terminal and select the AT Port (usually /dev/ttyUSB2 on Linux or a specific COM port on Windows). Type ATI to confirm the modem model and firmware version. Query the current IMEI by typing:AT+GSN or AT+CGSN. 2. Disable Interference
If you are using a Linux-based system (like Mobian or OpenWrt), you must stop services that might lock the serial port, such as ModemManager: systemctl stop ModemManager.service Use code with caution. 3. Write the New IMEI
Use the AT+EGMR command with parameters set for writing (1) to the IMEI field (7). Instructions to change the IMEI - PinePhone - PINE64 Forum
You're looking for information on how to change the IMEI (International Mobile Equipment Identity) of a Quectel EC25 module. The Quectel EC25 is a popular LTE module used in various IoT and M2M applications. Changing the IMEI of such a module can be necessary for certain applications, especially when multiple devices need to share a single cellular subscription or for testing purposes. However, it's crucial to note that modifying the IMEI can be against the law in some jurisdictions and can also violate the terms of service with your mobile network provider. Always ensure you have the legal right and proper authorization to make such changes.
If you are on a Linux host (OpenWrt/Raspberry Pi) and only see ttyUSB0: