The 3G Wireless - Diagnostics Interface Windows driver is a software driver that allows your computer to interact with a 3G wireless modem or mobile broadband device. These devices connect to cellular networks to provide internet access via 3G (and sometimes 4G) technologies. The Diagnostics Interface typically refers to a software interface used to monitor and manage the status of the wireless connection, such as signal strength, connection speed, data usage, and other network-related diagnostics.

The driver enables the Windows operating system to communicate with the modem or USB dongle, making it possible for you to use mobile broadband services and access network diagnostics from the system.