Yes, a modem is required for WildBlue Communications to provide internet service to your home or business. The modem serves as a bridge between the satellite signal and your devices, converting data both ways so you can access the internet effectively. WildBlue generally supplies the modem as part of the installation process, ensuring it is compatible with their satellite service. It is important to note that you may also need a router if you plan to connect multiple devices wirelessly at once. This setup allows for a seamless internet experience throughout the premises. For details on any specific modem requirements or additional equipment, it may be beneficial to check the WildBlue website, as they provide updated information regarding their services and equipment.