If you have an iPhone, you can use it for Nav. I have an iPhone 6 and a vent mount made by Insignia. With 8.3, we now get hotels, gas stations, food, etc. I pair mine via bluetooth, and plug in the USB. The phone stays on until I reach my destination; USB also charges the battery. Siri will call out directions; the volume of the radio goes down while Siri speaks. Why buy another device? The screen is big enough for me. I do not know if this works with Android. During my route, I can ask Siri for gas and food, etc, based upon my location. Location has to be ON.