The Fibocom L850-GL is a popular cellular module used in various IoT (Internet of Things) applications, including industrial automation, smart cities, and connected devices. One common query related to this module is changing its IMEI (International Mobile Equipment Identity) number.
: Some users report needing to follow up with a reset command or a full power cycle of the device to apply the change. AT+CFUN=15 (to reboot the modem) Troubleshooting Tips
Many online forums suggest that sending simple AT commands through a serial interface can permanently change the IMEI of an LTE module. For the Fibocom L850-GL, these claims are structurally inaccurate. The Standard AT+EGMR Command
A: No. Carrier lock is separate (SIM lock). Changing IMEI does not remove SIM network unlock. fibocom l850gl change imei work
The modem must be forced into a state where it accepts raw data. This often requires specific "AT Commands" sent through a terminal (like PuTTY or TeraTerm). 2. Backing up the NVRAM
Disclaimer: This article is for educational purposes only. Modifying a device's IMEI is illegal in many regions and may violate carrier terms of service. If you're looking for more specific help, tell me:
If you have worked with Quectel or Sierra Wireless modems, you might be familiar with basic AT commands like AT+EGMR=1,7,"IMEI" . Running this directly on a Fibocom L850-GL will output an ERROR response. mdsdtech/Fibocom-L860GL-IMEI-Changer - GitHub The Fibocom L850-GL is a popular cellular module
On Mediatek and certain Qualcomm modules, commands like AT+EGMR=1,7,"NEW_IMEI" are used to rewrite identity registers.
: Community-driven projects like Fibocom-L860GL-IMEI-Changer provide scripts that may also work for the L850-GL due to shared architecture. Important Considerations
If you have a (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+CFUN=15 (to reboot the modem) Troubleshooting Tips Many
: If a network operator detects two identical IMEIs active on the network concurrently, or flags an invalid IMEI checksum, both identities are instantly blacklisted globally across the GSMA database.
: Production units pulled from operational laptops almost never ship with SecureLevel 0. Checking or forcing a downgrade to SecureLevel 0 requires access to specialized, proprietary leak tools (like Intel's internal platform flash utilities) and matching raw binary firmware images. The SecureLevel 1 Reality