1. A system for modifying functions or available choices on a mobile phone, said system comprising: one or more wireless sensors or detectors, located in a vehicle; said one or more wireless sensors or detectors determine relative or absolute position or coordinate of said mobile phone; and a controller, in response to said one or more wireless sensors or detectors determining that said mobile phone is within a first range, said controller receives a message indicating in-range status for said mobile phone, and said controller disables a first function or available choice on said mobile phone, according to one or more rules associated with said in-range status for said mobile phone; wherein said first range is in vicinity of position for operating or driving said vehicle; in response to said one or more wireless sensors or detectors determining that said mobile phone is outside of a second range, said controller or said mobile phone enables said first function or available choice on said mobile phone, according to one or more rules associated with said second range; wherein said first range and said second range are within said vehicle.