An HSPA DataCard Voice Device driver typically refers to a software package that allows your Windows operating system to communicate with a USB modem or a similar device designed for 3G/4G (or HSPA) network connectivity. These devices often combine data and voice functionality, allowing you to both access the internet and make voice calls over cellular networks. This driver is essential for enabling the device to function correctly with your computer, including supporting features like internet data transfer, SMS messaging, and voice calls if the device has voice capabilities.