This is the Fibocom FM350-GL, an M.2 Key B form factor 5G WWAN cellular communication module originally OEM customized for Lenovo ThinkPad laptops (Lenovo FRU Part No.: 5W11H85423). Powered by MediaTek T700 5G baseband chipset, it supports both 5G NSA non-standalone and SA standalone networking under Sub-6GHz frequency bands, with a peak downlink speed up to 4.67Gbps and uplink speed up to 1.25Gbps. It is backward compatible with 4G LTE, 3G WCDMA global cellular networks, equipped with 4×4 MIMO antenna reception for stronger signal performance. Built-in multi-constellation GNSS positioning (GPS, Beidou, GLONASS, Galileo) and eSIM function are available. The module carries full global certifications including CMIIT ID, FCC, IC, ANATEL, CE and UKCA, enabling worldwide roaming service. It is compatible with Windows, Linux and ChromeOS operating systems. Main applications include internal 5G cellular upgrade for ThinkPad high-end business notebooks, industrial tablet wireless data transmission, and mobile IoT devices. Note that the host device must be pre-installed with a dedicated M.2 WWAN slot and full 4-piece 5G antenna set for full-speed operation; Lenovo devices require BIOS whitelist verification for normal activation. Short Version Fibocom FM350-GL M.2 5G WWAN Module, Lenovo FRU 5W11H85423, Sub-6GHz SA/NSA 5G LTE Cat20, GNSS GPS Beidou, eSIM Supported, for ThinkPad X1 Carbon/T14/X13 Gen3 Laptop Internal Cellular Card, Global Multi-Band with Full Certifications.