[Strider]

I have been toying with the idea of getting the tee droid software but have a question. I have a blackberry pearl that was givin to me but i am not currently using. If i put this software on it can i just use the phone as is or do i need to have a paid/working phone service on the phone? I believe it is gps enabled so i am thinking i don't need to pay for the phone service to use it for golf.