Sailsky XM239 1200Mbps Dual Band Wireless WiFi Router A 4g WIFI router with sim card slot is a network device that forwards document packets between computer networks. In other words, the router deploys a “traffic command” on the Internet, allowing you to share your Internet link with your computer, smartphone, and other WIFI transmitters in your… Continue reading What is the function of 4g WIFI router with sim card slot?