HUAWEI Mobile Connect - 3G Network Card is a software package used to connect HUAWEI mobile broadband USB dongles (often used for 3G or 4G mobile internet) to your Windows computer. The "driver" refers to the software needed to allow the operating system to communicate with the device. If you have a HUAWEI mobile broadband device, installing the driver ensures that your computer can recognize and properly interface with the device, enabling you to use it to connect to mobile networks for internet access.