. Most retail L850-GL units ship with a higher security level, effectively locking the IMEI from further changes. Intel XMM Architecture:
In underground forums and certain Russian/Chinese hardware hacking communities, there is a method involving: fibocom l850gl change imei
Before you do anything else, confirm your L850-GL’s real IMEI: fibocom l850gl change imei
The ability to see the modem under "Ports (COM & LPT)" in Device Manager. fibocom l850gl change imei