Well, it either uses cell, data or magic. Those are the only three choices. Magic is out I think. Cell is also out since Cell can only make phone calls, so yea it uses data. In the middle of no where it won't work. But it is a very slick system and outstanding company.
For emergency crash calls, ride recording and lean and all that I have an app called Eat Sleep Ride that does all that. It senses the phone changing angle suddenly and the impact and the fact it isn't moving anymore and will text and call and email your location to any contacts you set up. It also records your ride, lean angles and speed info.
I was an early alpha tester, so I have if for free for life. I can't say I would recommend it to anyone, it's still pretty full of bugs and has limited abilities. Mowhak.Fusar is the way to go.