Portable Fast Speed Mobile Hotspot 3G Wi-Fi Modem Wireless Mini USB WiFi Router with SIM Card Slot Support 2/3G netowork for Car car or Bus This is not only 3G USB Modem! This is USB Wi-Fi Modem Router.Especially for the Car Use. Not work with T-Moblie AT&T Wireless access is available on both 3G network and Wi-Fi networks .NOT including SIM Card, need buy in local City) SIM card support 2G and 3G network , not support 4G Internet connection sharing, up to 8 users can access the Wi-Fi network at the same time. Work with external power supply, no limited working time. Able to connect with Tablet ,Laptop, notebook and different types of WI-FI devices ,best for Moblie Phone Use .