Would you like the official contact procedure for Fibocom technical support to request an IMEI restoration tool under warranty/repair terms?

Enter the IMEI at swappa.com/esn or imei.info . If reported lost/stolen, no amount of hacking will make it work long-term.

Often, a brand new SIM cannot be activated directly through the Fibocom L850-GL module on a laptop

: AT+EGMR=1,1 (enable IMEI modification) AT+EGMR=1,490000123456789 (set new IMEI)