This may be a dumb question, but I'm curious for a more concrete answer instead of me just assuming. I use Google Navigation quite a lot. That said, I also have a T-Mobile data plan where I get 100mb of 4G and the remainder after is unlimited with 2G or 3G or something like that. I forget the exact stipulations because I personally don't notice a difference and I'm always near wifi when I web browse. Moving along, I got a text from T-Mobile saying I was nearing my 100mb cap. Uh. What? Really? All I used this month was GPS. But then it hit me... I had been using Satellite mode the entire time so I could see the actual ground layout as I traveled. While I like this feature, I certainly don't need it. That got me wondering if Google Navigation actually used up any data when used in a regular mode. I used Google Navigation on a 15 minute trip and used so few data it was unreal. Like .02 mb or something? I forget what it was, but it was absurdly lower than what I experienced when I enabled Satellite mode. Which brings up another point... I used up like 2mb alone when I enabled Satellite mode. The big question is, does Satellite mode continually use data or did that 2mb jump I had at the beginning just take place to initialize the actual mode? In short: Does Google Navigation use any data when used in regular mode? Does Google Navigation use up a good chunk of data when used in satellite mode?