Correct. AT&T has their own GPS service but you can jut click maps and get it for free. I'm not sure if it uses data and if it does it probably uses close to none or just uses data to update the maps every few weeks.

 

AT&T Navigator DOES use data. As does any other GPS service on the marketplace.

If you're on the 200mb plan, I would shy away from using a navigation service just to be safe.

 

Use Google Maps and the app that says 'Navigation' which comes on the phone. Both are free and work very well. The Google Nav app also provides turn by turn. AT&T Navigator is the one that will bill you $9.99 a month.

 

If you want to keep track how much data you are using, dial *DATA# (*3282#). AT&T will later send you a text message telling you how much data you have used this month. I find it very handy.

 

I did some research on this as well, Google Navigation uses data from Google Maps to lay out the map course which doesn't take much datause, probably around a couple kb, and then after the layout has been mapped out, navigation will guide you with no use of data anymore.

I have also downloaded CoPilot from the market along with the USA maps onto my phone, CoPilot doesn't need the use of data, just the GPS system because the maps are already installed onto the phone, all it needs is for the GPS to be active so that it can transmit to the satilite to plan out the navigation. I forgot how much CoPilot was, but it is a one time fee, unlike At&t Navigation which is a monthly fee and uses data.

 

People in Australia will soon be able to use MetroView - it's currently in Beta testing.

You pay once for the App, downloading the Maps (about 600MB) may cost you - but after that there are no more network charges.