Fibocom L850-gl Change Imei Upd May 2026

You're looking for information on changing the IMEI of a Fibocom L850-GL module.

Before proceeding, consider:

Improved device flexibility: By changing the IMEI, developers can customize the device to operate on different networks or in different regions.
Enhanced device security: Changing the IMEI can help prevent device cloning and reduce the risk of device tampering.
Increased device compatibility: A changed IMEI can ensure compatibility with different network operators and regulatory bodies.
Better device management: A unique IMEI can simplify device management and tracking, making it easier to monitor and control device activity.

: AT+EGMR=1,1,"123456789012345"

Voided Warranty: Any IMEI modification physically damages the security seals (if soldering) and leaves firmware traces. Lenovo/Dell will reject all service claims.
Permanent Brick: Without a full EDL backup (which you cannot make without a JTAG programmer), a failed IMEI change turns the L850-GL into a dead chip. No AT command will revive it.
Carrier Blacklist Expansion: If you use a blacklisted IMEI, carriers may also flag your SIM card or account.
Criminal Liability: In the US, the FCC has prosecuted individuals for IMEI alteration. Fines exceed $10,000.

Force the L850-GL into Qualcomm Emergency Download (EDL) mode by shorting two test points (TP) on the module. This requires precision soldering.
Once in EDL, use QPST’s Software Download to read the full qcn (Qualcomm Calibration Network) backup.
Open the .qcn file in a hex editor. Locate the IMEI string (usually at offset 0x005A2 – varies by firmware).
Overwrite with your new IMEI (must have correct checksum).
Flash the modified .qcn back using QPST.
Reboot and hope the signature check doesn’t panic the modem.