4G680 is our 4G LTE router with the latest LTE technology. Simply pop in your chosen SIM card and you will have access to high-speed Internet that will support multiple devices.The device supports VOLTE and CSFB technology and by connecting an external landline or wireless phone, you can surf the Internet and make calls simultaneously.Not only that the Tenda 4G680 is exquisitely designed so you can place it anywhere around your home to enhance your decor.