Abstract: Electronic equipment, such as a mobile phone, PDA or other device, is operative to turn on and to turn off keylock function or another function or to alter a characteristic of such function in response to shaking or other movement of the electronic equipment, e.g., when the mobile equipment is shaken at a given frequency and amplitude, according to a given code, in a given direction, e.g., twisting/twirling and/or in an arcuate path or linear path. The electronic equipment includes a motion transducer providing motion signals representing motion and a comparator that compares motion signals to determine whether they match predetermined or programmed motion signals. A method of turning on or off or altering a function or a characteristic of a function of electronic equipment includes detecting occurrence of motion and in response thereto carrying out the turning on, turning off and/or altering if that motion matches a predetermined or programmed motion.