Using GPS on 800w (or other gps sprint phones) without PCS coverage

[brennj4]

Is it possible? I know that the GPS chip is built into the hardware, so is it possible to use it in areas outside of sprint coverage? I travel in the mountains a lot in areas without coverage. I had an old garmin gps that worked fine.

I just dont want to rely on it for directions and then have it crap out on me when it hits a sprint dead spot.

Also, anyone know if the 800w does voice dialing or voice activated gps? How about audable turn by turn directions?

Thanks