Enjoy stable internet on vacation with these 4G MiFi routers. These MiFi routers work with a SIM card. They make a connection to the strongest 4G connection anywhere. This way, you even have a stable WiFi connection in the mountains. 4G routers have a speed of up to 2000Mbps. Need more speed? Get a 5G router. You need this when you want to work on the go with a few colleagues or if you have a large family, for example.