Lenovo 4XC1M72800 Internal WWAN Network Module Wireless M.2

The Lenovo Internal WWAN Network Card (4XC1M72800) is an M.2 wireless communication module based on the ThinkPad Fibocom FM350-GL 5G Sub-6 GHz platform. Designed as an internal M.2 PCIe Gen2 WWAN card with receive diversity, it provides mobile broadband connectivity for compatible laptops and devices, improving network reliability and enabling cellular data access while travelling. The compact green PCB and M.2 host interface make it suitable for integration into supported systems.

Advantages

This internal WWAN card supports 5G Sub-6 GHz connectivity and receive diversity to enhance signal robustness and network availability. Its M.2 PCIe Gen2 interface ensures compatibility with modern laptop WWAN slots and allows straightforward installation in supported models. The module's compact internal design minimizes impact on device size and weight while delivering consistent mobile internet access.

Suitable for

• Business and travel laptops that require cellular broadband
• Users who need on-the-go internet access without relying on Wi‑Fi
• Systems with an M.2 WWAN slot compatible with PCIe Gen2 modules

Key specifications

• Model: ThinkPad Fibocom FM350-GL (Lenovo 4XC1M72800)
• Cellular technology: 5G Sub-6 GHz
• Interface: M.2 (PCIe Gen2)
• Feature: Receive diversity
• Internal: Yes
• Weight: 0.008 kg
• Colour: Green (PCB)
• Form factor: M.2 WWAN module

How to use

Install the WWAN card into a compatible M.2 WWAN slot following the system manufacturer’s service manual. Secure the module with the appropriate screw and attach any required antenna cables for cellular operation. After physical installation, enable WWAN in the device BIOS/UEFI if necessary, then install drivers and firmware provided by Lenovo or the module manufacturer. Insert an active SIM card (or eSIM if supported) and configure network settings in the operating system to establish cellular data connectivity.

Recommendations

Use only in systems listed as compatible by Lenovo or the device OEM. Keep drivers and firmware up to date for optimal network performance and security. Ensure a supported SIM plan and follow carrier instructions for APN and activation settings.