Fibocom L850gl Change Imei [work] -

The Fibocom L850-GL is a popular Cat9 LTE modem used in many laptops and DIY networking setups. A common request for this module is how to change its International Mobile Equipment Identity (IMEI)—usually to bypass tethering restrictions or "mask" the device as a smartphone to use phone-only data plans.

However, the L850-GL (based on the Intel XMM7360 chipset) is notoriously difficult to modify compared to common Huawei or Quectel modems. Methods and Technical Challenges 1. The AT Command Method

Most modems allow IMEI modification via a simple AT command. For the L8-family of Fibocom modems, the standard command used is: AT+EGMR=1,7,"YOUR_NEW_IMEI_HERE".

The Catch: On many firmware versions of the L850-GL, this command is either locked or returns an error. Users on forums like 4PDA have reported that after certain firmware updates, the module may even lose its IMEI entirely, with no known way to restore it, effectively bricking the cellular functionality. 2. Specialized Tools (IMEI Changer)

Some developers have created scripts and tools to automate the process for Intel-based modems.

GitHub Repositories: Projects like mdsdtech/Fibocom-L860GL-IMEI-Changer are designed for the L860-GL but are often tested on the L850-GL as well.

USB Mode Switching: To even send commands, you often need to flip the modem from its default PCIe mode into USB mode using tools like xmm7360-usb-modeswitch. 3. Firmware "Cabling" or Flashing fibocom l850gl change imei

Changing the IMEI on these modules frequently requires flashing a "generic" or engineering version of the firmware that hasn't disabled the +EGMR command. This carries a high risk of permanently damaging the modem if the flashing process is interrupted. Step-by-Step Logic (For Advanced Users)

Общая тема по модемам Fibocom L8x0-GL - 4PDA

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

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.

Step-by-Step: Checking Your Current IMEI Without Hacking

Before you do anything else, confirm your L850-GL’s real IMEI:

On Windows:

Open Device Manager → Network Adapters → Find "Fibocom L850-GL".
Right-click → Properties → Advanced → "IMEI" or look for "Cellular" settings.
Alternatively, open PowerShell as admin and type: Get-NetAdapter -Name "Cellular" | Get-NetAdapterHardwareInfo (varies by driver).

On Linux:

sudo mmcli -L  # List modems
sudo mmcli -m 0 --command='AT+CGSN'  # Request IMEI

On macOS: Not natively supported (no drivers).

The Ultimate Guide to the Fibocom L850-GL: IMEI Modification – Risks, Realities, and Technical Deep Dive

Disclaimer: This article is provided for educational and research purposes only. Modifying the IMEI (International Mobile Equipment Identity) of a cellular module is illegal in most jurisdictions (including the US, EU, UK, China, and Australia) unless you are the original manufacturer or have explicit written permission from a regulatory body. Tampering with the IMEI can lead to severe criminal penalties, including fines and imprisonment. The author and publisher assume no liability for any misuse of this information. Proceed solely at your own risk.

Reasons for Changing IMEI

There are several reasons why one might consider changing the IMEI of a device:

Device Identification: In some cases, devices might need to masquerade as another device for compatibility or regulatory reasons.
Privacy: Some users might wish to change their IMEI for privacy reasons, to prevent tracking.

The Myth of Simple AT Commands

If you search online for "Fibocom L850-GL change IMEI," you will find forum posts suggesting commands like:

AT+EGMR=1,7,"New_IMEI"
AT+EGMR=1,10,"New_IMEI"
AT+EGMR=1,12,"New_IMEI"

Let me save you hours of frustration: These commands do not work on the L850-GL. The Fibocom L850-GL is a popular Cat9 LTE

The AT+EGMR (Enhanced Generic Model Reset) command is used on older Qualcomm or MediaTek chips. The Intel XMM 7560 inside the L850-GL uses a proprietary, manufacturer-locked interface. Even if you send the command via a terminal (PuTTY, minicom, or RealTerm), the modem will return:

ERROR or +CME ERROR: operation not allowed

Why? Because Fibocom and Intel implemented Secure IMEI Write Protection. The IMEI can only be changed if you have:

Engineering firmware (not publicly available).
Manufacturer-level USB debugging keys.
A signed binary from Fibocom.

Step 3: Verify Current IMEI

Send the following AT command (press Enter after each):

AT+CGSN

Expected response: +CGSN: 123456789012345 (your current IMEI).

Save this value somewhere safe.

Step 1: Identify the IMEI Storage Location

Using a Linux system with lsusb and modemmanager, you dump the modem’s QMI (Qualcomm MSM Interface – ironically, Intel uses a similar protocol) or MBIM (Mobile Broadband Interface Model) descriptors. The IMEI is buried in the NVM folder.