Smart phones are not included in the product.If there is unevenness on dashboard, suction cup can't work properly. Use support plate .Do not place on anywhere disturb eyesight.Do not put over airbag.Place on even and horizontal space. You cannot install this product on curved surface.Sudden acceleration and brake, driving on curved load and rough load, may make this product fall.Installation work must be done in safe place. Never attach while driving.Remove from dashboard after use. Otherwise it may get disformed.To remove, make sure to pinch sucker cap knob.To install, there must be 40mm or more width, and thickness must be 17mm or less.