If your mobile phone keeps sliding around the inside of your car, then you need an Israeli “Sticko”. The gadget will stick your phone to your dashboard, windshield or any window. You can also stick other items – like a shower gel bottle to the wall of the shower. See the video.
http://nocamels.com/2013/11/israeli-gadget-will-enable-you-to-mount-your-phone-anywhere/
http://www.kickstarter.com/projects/805142288/sticko-a-tiny-sticky-phone-mount