Fibocom L850-gl | Change Imei
AT+GTSN=0,7
To change the IMEI on a Fibocom L850-GL, you must first ensure the modem is in a mode that allows AT command communication (such as USB mode rather than PCIe). While standard AT commands like AT+EGMR are common for many modems, the L850-GL specifically often requires specialized scripts or tools like found on community forums like 4PDA . Changing the IMEI on a Fibocom L850-GL
Authorized service centers can restore factory IMEIs without legal or warranty complications. fibocom l850-gl change imei
If you are an advanced user willing to risk destroying your module, here are the two documented approaches found in deep technical forums (e.g., Russian 4pda, Chinese bbs.51nb).
: Incorrectly applying commands or using incompatible firmware can permanently brick your modem. AT+GTSN=0,7 To change the IMEI on a Fibocom
| Required Item | Where to Obtain | |---------------|-----------------| | PuTTY or equivalent terminal | putty.org (free) | | Fibocom L850-GL drivers | Lenovo support website (if your module is in a Lenovo device) or Fibocom's official channel | | Intel Platform Flash Tool | Community archives (proceed with extreme caution) | | IMEI writing tool (imei_tool.cmd) | Community sources—verify file integrity with antivirus scans | | Firmware files | Lenovo support (via BIOS/Driver updates) or device-specific sources |
Changing an IMEI to avoid a blacklist is a criminal offense in most jurisdictions. If you are an advanced user willing to
Even genuine tools will fail on modules with recent firmware (L850-GL firmware 1.2.5+). Fibocom learned from the Huawei modems and closed this loophole.
Instead of changing the IMEI, which can lead to legal issues, users looking for improved functionality usually follow these steps: 1. Update Firmware to Latest Version
: If your laptop uses PCIe and won't let you talk to the modem, tools like the xmm7360-usb-modeswitch