I see you're on sprint. Are you on a simply everything or data plan? If so, it should be free. Otherwise you have to pay per month. Call sprint if you're on a plan that should provide it for free. Check sprint.com.
amazegps is free:
http://amazegps.com/index.php?page=h...=en&referrer=6
I use garminXT, but that's $99. It works like the real thing though.
There's also tomtom, copilot8, igo if you're willing to pay.
Welcome to the site by the way... and hit the thanks button if anyone helps you. lateR.