The change is only temporary until a power cycle. Send:
is a high-speed LTE CAT9 M.2 module widely used in laptops (particularly Lenovo ThinkPads) and industrial IoT devices [1].
If neither works, proceed with the generic method below.
AT commands are the universal language for communicating with modems like the L850-GL. They allow you to directly query and configure the modem. Key AT commands for working with the IMEI include: fibocom l850gl change imei
: Use a terminal or serial console software. Set the baud rate appropriately (typically 115200 for many modules).
You can use the AT+CGSN? command again to read back the IMEI. The response should be your newly set number. Alternatively, you can use the AT+GSN command as another way to request this information.
The most documented method for changing IMEI on Fibocom modules involves reflashing the firmware. The L850GL and L860GL use similar processes, as the L850GL is based on the Intel XMM7360 LTE modem, which is also used in other modules. Reversing engineering repositories exist that contain information on the public drivers and firmware for Fibocom L850-GL. The change is only temporary until a power cycle
Entering a special factory mode to allow deep communication with the module.
:
There are several reasons why a user may need to change the IMEI of a Fibocom L850GL module: AT commands are the universal language for communicating
: Some modules require you to enable the editing of parameters. This might involve using a specific AT command like AT+EGMR=1,1 to enable writing.
Because the L850-GL is an Intel-based card, many users find success using or Phone Tool (often used by OEMs for factory calibration). These tools allow you to read and write the NV (Non-Volatile) items where the IMEI is stored. Common Challenges and Troubleshooting The "Read Only" Error
The output should now show your IMEI.