Lenovo 4XC1D69578 network card Internal WWAN 450 Mbit/s

The Lenovo Network Card 4XC1D69578 (ThinkPad Fibocom L850-GL) is an internal M.2 WWAN module that provides 4G LTE Cat9 cellular connectivity for compatible laptops and devices. It supports downlink speeds up to 450 Mbps and uplink speeds up to 50 Mbps, offering a high-speed mobile data option for users who require reliable internet access while traveling or away from Wi‑Fi.

Advantages

This internal WWAN card uses the M.2 form factor for compact integration and supports global 4G LTE Cat9 networks to deliver up to 450 Mbps download throughput and up to 50 Mbps upload throughput. The module is lightweight and designed for internal installation in compatible ThinkPad and other M.2 WWAN‑ready systems, enabling always‑on mobile connectivity without relying on external devices.

Suitable for

• Business laptops requiring mobile broadband connectivity
• Frequent travelers who need reliable LTE access
• Users upgrading from lower‑speed WWAN modules
• Devices with an available M.2 WWAN slot

Key specifications

• Manufacturer model: ThinkPad Fibocom L850-GL (Lenovo 4XC1D69578)
• Network technology: 4G LTE Cat9
• Max downlink speed: 450 Mbps
• Max uplink speed: 50 Mbps
• Host interface: M.2
• Internal: Yes
• Weight: 0.0058 kg

How to use

Install the module into a compatible device's M.2 WWAN slot following the laptop manufacturer's hardware and regulatory instructions. After physical installation, install any required drivers or firmware provided by Lenovo or the module vendor, then insert an activated SIM card from your mobile operator. Configure the APN and connection settings in the operating system network manager to establish mobile data access.

Recommendations

For optimal performance, ensure your device's BIOS supports the Fibocom L850-GL and that you use a compatible antenna setup and an activated data plan from a carrier that provides LTE Cat9 coverage in your area.