Cellular broadcast at different frequencies than WiFi does and a modem is required to use service provided by Cellular carriers. However, certain WiFiRangers, if ordered with the LTE option, can support multiple different cellular carriers (AT&T, Verizon, and T-Mobile (Millenicom)). Placing the modem in a rooftop enclosure provides it a significant positional advantage relative to have it inside your RV. However, no amplification is provided. The WiFiRanger GoAC and Core indoor routers also have the capability of tethering USB cellular modems and WiFi hotspots.