I'm trying to put my finger on how all this data transfer works and what it all costs. From what I've read the Energi has Wifi, okay that one's easy. I've also read it has 3G or some kind of cellular data connection. Can't imagine a cellular data connection without fees. Can anyone elaborate on this? Then theres Sync, I don't know much about it or if I need it but I'm sure it comes with a cost. Finally theres Sirius services. I'm familiar with their sat radio, if you like it you pay for it, if not you don't. But the Energi has a few extra Sirius services (NavTraffic, NavWeather, SiriusXM Travel Link) that I can't find much detail on. Can someone enlighten me on how all this works and what it's going to cost in the real world. Thanks in advance!