Changing the IMEI on a Fibocom L850-GL Go to product viewer dialog for this item.
(Intel XMM7360) is significantly more difficult than on Qualcomm-based modems because it lacks a standard "engineering mode" for permanent IMEI writes.
Most users attempt this to bypass carrier "phone-only" SIM restrictions on laptops. While "IMEI repair" is legally complex and often restricted, here is the technical reality for this specific hardware: ⚠️ Critical Warnings High Risk of Bricking
: Incorrect AT commands on Intel modems can permanently disable the firmware. Firmware Locked
stores the IMEI in a secure partition that is not accessible via standard commands used on other devices. Carrier Detection
: Even with a changed IMEI, carriers can often detect a laptop modem via its TTL (Time to Live) Technical Approach & Limitations AT Commands (Read Only) You can view your current IMEI by sending to the modem's COM port (usually /dev/ttyACM0 or similar). Standard write commands like AT+EGMR=1,7,"NEW_IMEI" do not work PCIe vs. USB Mode often runs in
, which hides the modem from traditional USB-based IMEI tools. Tools like xmm7360-usb-modeswitch can flip the modem into
, but this is typically for driver compatibility, not IMEI modification. Alternative: The L860-GL Script There is a community-developed tool for the (a newer model) available on that claims to modify Intel-based IMEIs. fibocom l850gl change imei work
: This script is specifically for the L860 series; running it on an may result in a permanent hardware error. Better Alternatives to Fix Connection Issues
If your goal is to make your SIM card work, try these steps which are safer than IMEI modification: Change the APN
: Match the APN to your carrier's specific "Phone" or "Broadband" setting. Adjust TTL : If your carrier blocks hotspots, set your OS TTL to to mask laptop traffic as mobile traffic. Unlock the Modem
: If the modem is locked to a specific carrier (e.g., TMN or MCI), use a remote unlock service instead of changing the IMEI. If you'd like to proceed, tell me: Are you on are you trying to use? What is the specific error message you see when you try to connect?
Tools for the Fibocom L850-GL / Intel XMM7360 LTE modem · GitHub
While there is no standard AT command to change the IMEI on a Fibocom L850-GL, specific community tools and scripts can perform this action for repair or legitimate restoration purposes. Key Methods and Tools
IMEI Changer Tool: Specialized scripts like imei_tool.cmd are often used in conjunction with specific firmware versions. Changing the IMEI on a Fibocom L850-GL Go
Port Communication: The process typically involves identifying the modem's COM port through the Windows Device Manager and then using a terminal to send specialized commands.
GitHub Repositories: Community-driven projects like Fibocom-L860GL-IMEI-Changer provide scripts that may also work for the L850-GL due to shared architecture. Important Considerations
Legal Risks: In many jurisdictions, including the US, UK, and EU, altering an IMEI number is illegal and can lead to severe penalties, such as fines or imprisonment.
Bricking Risk: Incorrectly flashing firmware or using these tools can result in a "lost" IMEI with no known way to recover it, effectively rendering the modem useless.
Carrier Detection: Carriers use IMEI numbers to identify device types. Changing an IMEI to bypass data plan restrictions (e.g., using a phone plan on a modem) may violate terms of service and lead to a permanent network ban. Verification & Documentation
Record Original IMEI: Always document your factory IMEI from the device sticker or box before attempting any changes, as many tools do not offer a "reset to factory" function.
Firmware Compatibility: Some versions of the L850-GL may automatically reset the IMEI to zero or "Invalid" after a firmware update if the process is not followed precisely. Прошивка: Changing the IMEI of a cellular modem is
I understand you're looking for a guide on changing the IMEI of a Fibocom L850-GL module. However, I must start with a strong warning:
Changing the IMEI of a cellular modem is illegal in many countries (including the US, EU member states, UK, Canada, Australia, Japan, etc.) unless you have explicit written permission from the device owner and the carrier. IMEI alteration is often used for cloning stolen phones, evading network bans, or bypassing carrier locks — all of which are serious offenses punishable by fines or imprisonment.
If you have a legitimate reason (e.g., replacing a faulty module in a laptop with identical IMEI, testing your own hardware in a lab, or repairing a device under manufacturer guidance), proceed only after confirming local laws.
AT+CGSN)A: Contact the seller for a refund. Or replace the modem – the L850-GL is removable. Do not change IMEI without written permission from the original carrier confirming the device is not stolen.
A: Yes, using modemmanager low-level commands or echo -e "AT+EGMR=1,7,\"NEWIMEI\"" > /dev/ttyUSB2. But most Linux kernels lock the diagnostic port.
Many mobile carriers (especially in the US, Canada, and Japan) maintain IMEI whitelists. If your L850-GL was originally sold with a Lenovo laptop in Europe, a US carrier like Verizon or AT&T may reject it outright. Changing the IMEI to a “known good” number might bypass this.