Nokia N95

I am looking to getting this phone as a gift for my brother who will be going to Sub Sahara Africa for 2 years (peace corps).

Does the GPS use the cell phone towers or is it a completely seperate hardware that uses the satellites with the appropriate software (e.g. Garmin)? I'm assuming if its just hardware with right application, the price will just be the cost of the software, correct?

Thank you in advance.