The standard command used for many Intel-based modems like the L850-GL is AT+EGMR .
Because a permanent hardware-level IMEI write is blocked on most fibocom l850gl change imei work
While standard AT commands will fail on an un-modified L850-GL, there are two primary methods developers use to make an IMEI change work. Method 1: Flashing Engineering / Downgraded Firmware The standard command used for many Intel-based modems
| Your goal | Safer solution | |-----------|----------------| | Unlock carrier restriction | Request unlock code from original carrier or use paid unlocking service | | Use modem in different device | Buy an already-unlocked Fibocom L850-GL (eBay, AliExpress) | | Replace failed modem | Use identical part number and request IMEI reassignment from laptop manufacturer | | Test in embedded system | Use a modem development kit with permission to modify IMEI (e.g., Quectel with AT+EGMR allowed) | While designed for smartphones, the principle can be
For Android-based systems, tools like Change-IMEI-Android implement exactly this approach — the IMEI is spoofed in runtime memory while the physical file remains untouched. While designed for smartphones, the principle can be adapted for router-based applications running Android or modified Linux distributions.