The L850-GL is based on an Intel XMM 7560 modem chipset. This chipset has known AT command backdoors that allow IMEI reprogramming if you can enter low-level diagnostic modes. However, modern firmware (post-2019) from Lenovo, Dell, and HP has patched many of these vulnerabilities.
Protect Your IMEI: Risks, Misuse, and How to Stay Safe - NSYS Group fibocom l850gl change imei work
For those using the L850-GL in a router, the OpenWRT community has developed scripts like xmm75xx-info or IMEIChanger to interact with the Intel chipset. 3. Diagnostic Mode & QCN (Snapdragon-style) The L850-GL is based on an Intel XMM 7560 modem chipset
Changing the IMEI on a (Intel XMM7360 chipset) is a highly technical and often restricted process . Unlike many Qualcomm-based modems where a simple AT command might work, the Fibocom L850-GL features significant security locks that make IMEI modification difficult or even impossible on most retail versions. The Challenges of IMEI Change on L850-GL Protect Your IMEI: Risks, Misuse, and How to
for non-experts. Even experts rarely attempt this due to bricking risk.