One user suggested that "generally it requires debugging software plus matching AT commands," indicating that direct modification via standard means is not intended to be possible. A later response noted, "there is software on GitHub, but it can only be changed on Windows" — though the exact software was not identified.
Even if a temporary buffer modification registers a fake IMEI on a specific terminal window, the change is entirely volatile.
Because newer firmware variants completely block memory writes to the IMEI block, users must downgrade the module to a vulnerable or engineering version of the firmware using tools like Intel's .
The primary hurdle is the of the modem's firmware. Most retail units shipped in laptops like Lenovo ThinkPads or Dell Latitudes have a SecureLevel higher than 0 , which hardwires the IMEI into the hardware.
Many tutorials on online forums outline quick methods to alter cellular identities using standard command-line tools. For example, MediaTek or Qualcomm chipsets often respond to simple inputs like: AT+EGMR=1,7,"123456789012345" Use code with caution. If you run this command on the Fibocom L850-GL , the modem will immediately return an . The Intel XMM 7360 Architecture Barrier fibocom l850gl change imei work
Fibocom L850-GL is a high-speed Cat9 LTE module based on the Intel XMM7360 chipset. While users often seek to modify the
to rewrite the identifier, Fibocom modules often require entering a specific engineering or "factory" mode first. Hardware Interface
Even though L850-GL uses an Intel baseband, some variants share Qualcomm-style NV storage. This method is more promising but dangerous.
: In many jurisdictions, including the US, UK, and EU, altering an IMEI number is illegal and can lead to severe penalties, such as fines or imprisonment. One user suggested that "generally it requires debugging
is a highly popular Intel XMM7360-based Cat 9 LTE WWAN module frequently found in corporate laptops like Lenovo ThinkPads or deployed in custom OpenWRT/router DIY builds . A common issue arises when mobile network operators restrict data usage on "broadband devices" (modems and routers) while allowing unlimited data on smartphones. To bypass these arbitrary carrier blocks and make the module work seamlessly, enthusiasts often resort to —replacing the modem's factory signature with that of an unused smartphone.
Most users report ERROR or CME ERROR: operation not allowed . Success rate: <5% on post-2020 firmware. Why? The command parser rejects write requests to the NV (non-volatile) memory.
If you are among the few with a modifiable module, here are the general steps that "work" for some: 1. Standard AT Command Method
In many jurisdictions, including the United States (under the federal Communications Act), the United Kingdom, and the European Union, altering or counterfeiting an IMEI is a federal or criminal offense. Many tutorials on online forums outline quick methods
In many cellular modules, IMEI modification is performed via AT commands. For Fibocom L850GL, the standard AT+CGSN command only reads the current IMEI. Writing a new IMEI requires vendor‑specific commands.
: Production units pulled from operational laptops almost never ship with SecureLevel 0. Checking or forcing a downgrade to SecureLevel 0 requires access to specialized, proprietary leak tools (like Intel's internal platform flash utilities) and matching raw binary firmware images. The SecureLevel 1 Reality
For the L860GL‑16, the IMEI can only be successfully rewritten if during firmware flashing. For the standard L860‑GL, no special erase mode is needed.