Changing IMEI on Fibocom L850-GL: A Step-by-Step Guide
The Fibocom L850-GL is a popular cellular module used in various IoT devices, providing wireless connectivity and communication capabilities. However, there may be situations where you need to change the IMEI (International Mobile Equipment Identity) of your Fibocom L850-GL module. This article will guide you through the process of changing the IMEI on your Fibocom L850-GL module.
Why Change IMEI?
There are several reasons why you might want to change the IMEI of your Fibocom L850-GL module:
Precautions
Before attempting to change the IMEI on your Fibocom L850-GL module, please note:
Tools and Requirements
To change the IMEI on your Fibocom L850-GL module, you will need:
Step-by-Step Instructions
To change the IMEI on your Fibocom L850-GL module:
AT command to enter AT command mode. The module should respond with OK.AT+EGMR=0,1 command to disable IMEI write protection.AT+EGMR=1,1,"<new_imei>" command, replacing <new_imei> with your desired IMEI number (e.g., AT+EGMR=1,1,"353490123456789").AT+CGMI command to verify the new IMEI has been set.AT+EGMR=0,0 command to re-enable IMEI write protection.Conclusion
Changing the IMEI on your Fibocom L850-GL module requires careful attention to detail and adherence to proper procedures. Ensure you have a valid, unique IMEI number and follow the step-by-step instructions outlined in this article. If you are unsure or uncomfortable with the process, consult with a qualified technician or contact Fibocom support for assistance.
How to Change the IMEI on a Fibocom L850-GL: A Comprehensive Guide
The Fibocom L850-GL is a popular M.2 LTE Cat9 module widely used in laptops like the Lenovo ThinkPad and HP EliteBook. While it offers excellent connectivity, enthusiasts and power users often seek to modify its settings—including the International Mobile Equipment Identity (IMEI)—to bypass carrier restrictions, fix compatibility issues, or for research purposes.
In this article, we will explore the technical steps, necessary tools, and critical risks involved in changing the IMEI of a Fibocom L850-GL. ⚠️ Important Disclaimer
Changing a device's IMEI is illegal in many jurisdictions (such as the UK, India, and parts of the EU) and may violate your carrier's Terms of Service. This guide is for educational and diagnostic purposes only. Proceeding may void your warranty or permanently "brick" your hardware. Understanding the Fibocom L850-GL
The L850-GL is built on the Intel XMM 7360 chipset. Unlike older Qualcomm-based modules that use standard AT commands for IMEI modification, Intel-based modems are significantly more locked down. Modification usually requires interacting with the modem's firmware or using specialized engineering tools. Prerequisites
Before attempting any modification, ensure you have the following:
Drivers: Correct Fibocom/Intel XMM 7360 drivers installed on a Windows PC. fibocom l850gl change imei
Port Access: The ability to see the modem under "Ports (COM & LPT)" in Device Manager.
Terminal Software: Tools like PuTTY, Tera Term, or NB-IoT/LTE Engineering tools.
Firmware Version: Ensure you know your current firmware version, as some methods are patched in newer releases. Step-by-Step Method (Overview) 1. Enabling Engineering/Diagnostic Mode
By default, the L850-GL hides its diagnostic ports. You must send a specific AT command to reveal them.
Open your terminal software and connect to the modem's AT command port.
Type AT+GTUSBMODE=7 (or the specific mode code for your firmware version).
The modem will restart, and new ports should appear in the Windows Device Manager. 2. Finding the Right AT Command
For many Intel modems, the standard AT+EGMR command used for Qualcomm chips will not work. Instead, engineering commands like AT+XCPERM or specific manufacturer-locked commands are often required.
Command Structure: Often looks like AT+XIMEI="your_new_imei".
Verification: After sending, use AT+CGSN to check if the modem reports the new identity. 3. Using Specialized Software
Because the L850-GL is an Intel-based card, many users find success using Intel's Flash Tool or Phone Tool (often used by OEMs for factory calibration). These tools allow you to read and write the NV (Non-Volatile) items where the IMEI is stored. Common Challenges and Troubleshooting The "Read Only" Error
Most modern L850-GL modules have write-protection on the IMEI sector. If you receive an "ERROR" response to AT commands, your firmware may be locked. You might need to downgrade to an earlier, "unlocked" engineering firmware before the changes will take effect. Driver Disappearance
Switching USB modes can sometimes cause the device to vanish from the OS. Always keep your original AT+GTUSBMODE value handy to revert the modem to its standard laptop-integrated state. The Role of the Firmware
If the IMEI change doesn't "stick" after a reboot, the modem is likely pulling the original ID from a protected bootloader partition. In this case, a deep firmware flash is the only solution. Is it Worth It?
For most users, the Fibocom L850-GL is best used with its default settings. However, if you are a developer working in a lab environment or a hobbyist trying to get a ThinkPad module working on a specific IoT network, the steps above provide the framework for modification.
Final Tip: Always backup your original NV RAM and IMEI before making any changes. If the process fails, you will need those backups to restore cellular functionality to your laptop.
Modifying the IMEI on a Fibocom L850-GL is a complex technical process that is significantly more difficult than on many other popular LTE modems. While many users attempt this to use smartphone-only data plans in a laptop or router, it involves navigating specialized firmware tools and specific hardware limitations. Technical Feasibility and Challenges
The Fibocom L850-GL is based on the Intel XMM 7360 chipset, which is notorious for being difficult to modify. Changing IMEI on Fibocom L850-GL: A Step-by-Step Guide
Modem Mode Switching: Most L850-GL modems in laptops operate via the PCIe interface by default. To even send the necessary AT commands for IMEI modification, the modem often needs to be flipped into USB mode, which is only possible on specific hardware with USB lines routed to the M.2 slot.
AT Command Limitations: Standard AT commands like AT+EGMR, which work on many MediaTek or Quectel modems, often fail or are restricted on the Intel-based L850-GL. Some users report the command only accepts the original factory IMEI, effectively blocking changes.
Guarantees and Risks: Leading technical communities like 4PDA note that while the L860-GL has more reliable methods for IMEI modification, the L850-GL is much less consistent. Improper attempts carry a high risk of bricking the modem. Modification Methods and Tools
For those who proceed, the following resources and methods are frequently cited in technical forums:
Firmware Tools: Specialist tools like Platform Flash Tool Modem or the IMEIChanger.zip utility shared on community forums are often required to interact with the modem's deeper firmware layers.
Operating System Requirements: Modifications are typically attempted through OpenWrt or specialized Windows scripts.
XMM-specific Tools: Projects such as xmm7360-usb-modeswitch on GitHub are essential for making the modem visible to tools that can send commands. Review Summary
Category 9 LTE: Offers excellent speeds (up to 450Mbps) when working correctly.
Extremely High Difficulty: Not a "one-click" process; requires deep technical knowledge.
Budget Friendly: Often available at a lower cost than newer 5G or CAT16 modules.
Hardware Dependency: May require specific laptop models or external M.2 to USB adapters.
Community Support: Large user bases on forums like 4PDA provide scripts and troubleshooting.
Legal/Service Risks: Changing an IMEI may violate local laws or carrier terms of service.
Important Note: In many jurisdictions, changing an IMEI is illegal. Additionally, carriers use various methods beyond the IMEI, such as TTL (Time to Live) tracking, to detect tethering or unauthorized device use. xmm7360/xmm7360-usb-modeswitch: Tools for the ... - GitHub
Changing the IMEI on a Fibocom L850-GL is generally performed using specific AT commands through a terminal or specialized software tools, though it is important to note that this is illegal in many jurisdictions and can risk "bricking" the modem. Common Methods xmm7360/xmm7360-usb-modeswitch: Tools for the ... - GitHub
Changing the IMEI (International Mobile Equipment Identity) of a Fibocom L850-GL module involves a series of technical steps that require careful consideration due to legal and technical implications. The IMEI is a unique identifier for mobile devices, and altering it can have significant legal consequences in many jurisdictions. This report provides an overview of the process but does not encourage or endorse illegal activities.
Before attempting an IMEI change, you must understand what the L850-GL actually is. It is not just a simple radio; it is a miniature computer running its own firmware.
This last point is crucial: The IMEI is cryptographically protected. Unlike cheap Chinese USB dongles from 2010, the L850-GL uses signed firmware and secure storage. Precautions Before attempting to change the IMEI on
In underground forums and certain Russian/Chinese hardware hacking communities, there is a method involving:
Here is a high-level, unverified technical workflow discussed in reverse-engineering circles:
Always refer to the official documentation provided by Fibocom and ensure you are complying with all relevant laws and regulations. If in doubt, consult with a professional or the device manufacturer.
Fibocom L850-GL Change IMEI: A Step-by-Step Guide
The Fibocom L850-GL is a popular cellular module used in various IoT devices, routers, and other applications. However, there may be situations where you need to change the IMEI (International Mobile Equipment Identity) of the module. In this post, we'll provide a step-by-step guide on how to change the IMEI of the Fibocom L850-GL.
Why Change IMEI?
Before we dive into the process, let's briefly discuss why you might need to change the IMEI of your Fibocom L850-GL module. Some common reasons include:
Prerequisites
To change the IMEI of your Fibocom L850-GL module, you'll need:
Step-by-Step Instructions
Here's the step-by-step process to change the IMEI of your Fibocom L850-GL module:
AT+EGMR=1,1,"new_imei".Example AT Command
Here's an example of the AT command to change the IMEI:
$$AT+EGMR=1,1,"490154203237518"$$
Replace 490154203237518 with your new IMEI.
Conclusion
Changing the IMEI of your Fibocom L850-GL module is a relatively straightforward process. By following these steps and using the correct software tools and firmware, you can update the IMEI to meet your specific requirements. If you're unsure about any part of the process, consult the Fibocom documentation or contact their support team for assistance.
Disclaimer: This post is for educational purposes only. Changing the IMEI of a cellular modem is illegal in many jurisdictions (e.g., EU, USA, Canada, China) unless you are the original equipment manufacturer or a licensed repair center with legal justification (e.g., replacing a broken modem with a donor IMEI from an identical, legally owned device). Modifying an IMEI to bypass carrier blacklists or evade tracking is a serious crime. Proceed at your own risk.
AT+QWGMR (Some Fibocom firmware)AT+QWGMR=1,7,"NEW_IMEI_15_DIGITS"
Target Device: Fibocom L850-GL (PCIe M.2 form factor) Common Hosts: Lenovo ThinkPad T/X/L series, Dell Latitude, HP EliteBook Goal: Change the modem’s IMEI using AT commands via a serial interface.
You would hex-edit the firmware image, searching for the ASCII or packed BCD representation of your current IMEI (e.g., 35 31 33 35...) and replace it with the target IMEI, ensuring the checksum (often Luhn algorithm for the last digit) is recalculated.
