Before you begin, you need the right environment to talk to the modem:
: Incorrectly flashing firmware or sending unsupported commands can "brick" the modem, rendering it unusable. Always back up your original IMEI before attempting changes. fibocom l850-gl change imei
What Is an IMEI Lock and How Does It Work? A Complete Guide - floLIVE Before you begin, you need the right environment
Before proceeding, consider:
AT+CGSN
If you are using the modem in a router (like MikroTik or an OpenWRT-based device): Before you begin
Open a serial terminal (115200 baud, 8N1, no flow control). Send AT – should return OK .