If you have iPhone 3.0 OS on your iPhone and use AT&T you can download the free AT&T Navigator: GPS navigation app for the iPhone which charges you a monthly fee of $10 on your AT&T bill. The app is the familiar TeleNav application ported over for the iPhone with pretty much the same look and feel.

AT&T Navigator, powered by TeleNav for iPhone gives you voice turn-by-turn directions on the road, and re-directs you on the fly if you make a wrong turn. AT&T Navigator is AT&T’s best selling app now available for the iPhone 3G and 3G S. Features include:

Drive to:
- Full-color 3D moving maps
- Address speech recognition
- Automatic reroute if a turn is missed
Search:
- Business finder with over 10 million listings and ratings
- Daily gas prices
- Search along route
Traffic:
- Traffic alerts with one-touch rerouting
- Map, traffic and route summary views
Extra:
- Online trip pre-planning
- Map and business listings updated automatically

Here is a video demo of the AT&T Navigator app on the iPhone 3GS

This 3rd Party App is available at the Apple iTunes AppStore. Browse the full list of all AppStore apps filed under the AppStore category.