There is a tool designed for the module, but its compatibility with the L850GL is questionable.
Attempting to force IMEI modifications on the Fibocom L850-GL carries a high probability of permanently destroying the hardware. fibocom l850gl change imei
To conclude this deep dive: The Fibocom L850-GL is a modern, secure, enterprise-grade LTE module engineered to IMEI modification. Unlike older, insecure modems, it uses cryptographic signatures, secure boot, and proprietary Intel baseband protection. There is a tool designed for the module,
The Fibocom L850-GL is an LTE Cat-9 M.2 cellular module widely integrated into laptops (such as Lenovo ThinkPad and HP EliteBook series) and industrial IoT gateways. 5. Troubleshooting Common Verification Issues
Note: Any error in checksum calculation or partition alignment during this process will permanently brick the Fibocom L850-GL module. Troubleshooting and Verifying Network Connection
Attempting to rewrite firmware or partition data on an Intel-based modem can permanently brick the hardware, render the laptop unstable, or violate carrier terms of service. 3. Preparing the Environment for Module Access
The modified and resigned NVM file is written back to the flash memory of the module using the Intel Download Port. 5. Troubleshooting Common Verification Issues