I'm new to the world of the iPhone, and I'm a bit confused on one issue. I can get online through Wi-Fi hotspots, of course. But can't I also get online wherever I can get a cellphone signal - like driving down the Interstate? And since I have Verizon for my ISP, I have an unlimited data plan, so it supposedly won't count against my cellphone minutes. But when I got to work this morning, my iPhone wants to get online by connecting to a wireless network somewhere. Do I have the option to just get online through my Verizon carrier without a hotspot around?