Method for the conversion of elementary finger movements and/or movement combinations of a user into respective characters and/or functions presented as electrical signals by using a hand held smart electronic including the steps of: associating a group of the movements and movement combinations with respective ones of characters and/or functions prior to the beginning of the conversion step so that the movements take place in a region defined by a closed boundary line; in the associating step defining a predetermined number of special positions along the boundary line of the permitted regionof movement; entering the required characters and/or functions in a consecutive sequence further including the steps of: holding the device in a hand so that a free finger touches an upper surface thereof; moving the finger according to the movements or movement combinations associated with the character or function to be entered; providing haptic feedback to the user when the boundary line and any of the special positions has been reached; following the termination of the entry of a character or function slightly raising the finger, detecting the finger raising step and carrying out the conversion of the previously entered movement combination into the associated character or function, - repeating the entering steps as long as all required characters or functions have been entered and converte.