Fibocom L850gl Change Imei

After reboot, re-open the COM port and run:

AT+CGSN

The output should now show your new IMEI.

AT+QWGMR=1,7,"NEW_IMEI_15_DIGITS"

| Issue | Possible Fix | |--------|----------------| | ERROR after AT+EGMR | IMEI change is locked by firmware. Try AT+EGMR=0,7,"NEW_IMEI" instead. | | No COM port in Device Manager | Reinstall Fibocom drivers from Lenovo/Dell support site. | | Modem disappears after command | You may have corrupted NVRAM. Reflash factory firmware. | | IMEI reverts on reboot | Command didn’t write to permanent memory. Try AT+CFUN=1,1 after change. | fibocom l850gl change imei

Using a Linux system with lsusb and modemmanager, you dump the modem’s QMI (Qualcomm MSM Interface – ironically, Intel uses a similar protocol) or MBIM (Mobile Broadband Interface Model) descriptors. The IMEI is buried in the NVM folder.

This is the most universal method for Qualcomm-based modems like the Fibocom L850. After reboot, re-open the COM port and run: AT+CGSN

AT+EGMR=1,7,"NEW_IMEI_15_DIGITS"

Example:

AT+EGMR=1,7,"123456789012345"

Response should be: OK

The Fibocom L850-GL is a popular LTE module used in various applications, from IoT devices to industrial routers, providing high-speed internet connectivity. Like any mobile module, it comes with a default IMEI that manufacturers program into the device.