A Huawei mobile router is a portable device that allows users to connect to the internet using a cellular network. It works by inserting a SIM card into the device and creating a Wi-Fi network that multiple devices can connect to. Huawei offers a range of mobile routers with different features and capabilities, such as high-speed internet connectivity, long battery life, and support for multiple devices. These devices are popular among travelers, remote workers, and people who need internet access on the go.