Karla

Apple Support has an article that explains Location Services.

iPhone and iPod touch: Understanding Location Services
http://support.apple.com/kb/HT1975

1. From the iPhone home screen, tap Settings.
2. Tap General.
3. Tap ON next to Location Services.

Please follow these instructions:

To create a Guidance route:

   1. Get a route as described in How to Get Directions.
   2. Add and reorder your stops as described in How to Add and Reorder Stops.
   3. Calculate your route. You can use Guidance for both walking and driving routes. When your route is loaded, it should say "Loading Route."
   4. From the route overview screen, tap Start. Tapping the Find Me icon (instead of start) will keep your My Position icon centered, the map will auto-pan, but you will not hear any guidance.
   5. Your My Position icon remains in the center of the screen. The map and directions banner automatically advance as you navigate your route. The distance in the directions banner is dynamically updated.
   6. To see the list view, tap List. The steps in your route are grayed as you navigate through your route.

If you are not approaching a turn, you will not hear any guidance.

Please also check the Alert volume:

To set the alert volume (both sounds and voice):

   1. Tap Settings at the bottom of the screen.
   2. Tap Guidance Options.
   3. Drag the slider to the left or right to decrease or increase the volume.

And make sure that the sound on your iPhone is on and turned up. See your iPhone documentation for instructions.

The MapQuest FindMe application has been discontinued effective 10/30/09. 

If you have any billing or refund questions, you must address them directly with customer service at Sprint Nextel or Boost. 

We apologize for any unintended inconvenience.

MapQuest applications use the GPS for locating your current position. The GPS consumes significant battery power.It is natural for battery power to drain and for the device to heat up during navigation.

Refer to the following article for information from Apple on iPhone batteries:

http://www.apple.com/batteries/iphone.html