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 region of 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 converted.