1) Is there a free GPS app that you recommend? My X came with VZW Navigator or something, but it also requires a $10/month fee. 2) What is that next to the green/red light on the screen-side, top left? It almost looks like a camera, but everything I read says DX's don't have front-facing cameras. It's to the right of where the green light flashes when you have a text or email.