The file contains "Hardware IDs" (Vendor ID and Product ID) that match specific phone models to the system's network drivers.

: Windows 10 automatically detects Android phones in USB tethering mode and loads the modern, integrated RNDIS driver by default.

— Using an XP‑era driver on Windows 10 can expose you to stability or security issues, as Microsoft’s hardware stack and driver model have changed significantly.

If you encounter a reference to tetherxp.inf on Windows 10 today, it's either: