The suction cup that came with mine came with a kind of a liquid inside it. Probably a mild adhesive of some kind. I would suggest that you mount your phone onto the X Grip and without removing the layer that covers the suction mount, make up your mind about where you'd want to mount it. While sitting in your natural position on the seat and check for visibility etc. Only then mount it onto the flat surface.I ordered a Ram X mount for iPhone. should have it here tomorrow... I have a question though.. Will the suction cup suck and hold onto the flat plastic surfaces ok.. I don't want to mount it to the windshield..