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 device (1, 60), comprising the steps of: - associating respective ones of said elementary finger movements and/or movement combinations made by the finger when touching an upper surface of the device with respective ones of said characters and/or functions prior to the beginning of said conversion step; - detecting the actual finger movements from the beginning of the movement of the touching finger until the finger is raised from the surface and regarding the session between the start of the movement till the raising of the finger from the surface as the entry of a single character and/or function; - following the detection of the finger raising step, carrying out the conversion of the previously entered elementary movement and/or 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, characterized in that a data entry region is defined on the surface or in an inner part of the hand held smart electronic device (1, 60), the data entry region being encircled by a closed boundary (7, 67) acting as a guiding path for the finger, the data entry region having a central part, a plurality of spaced special positions (8, 71-74) being provided along the boundary (7, 67), wherein the boundary (7, 67) and the special positions (8, 71-74) are designed to provide a haptic feedback sensation for the user when the finger reaches any one of them, distinguishable from the haptic sensation provided by the adjacent sections of the boundary (7, 67), wherein said elementary movements comprise either a movement of the finger from the central part of the date entry region to the boundary at one of the special positions (8, 71-74) or a movement between a special position (8, 71-74) to an adjacent special position (8, 71-74) along the boundary (7, 67) as a guiding path, wherein in said detection step the movement of the finger during the entry of a character or function is continuously sensed. - associating respective ones of said elementary finger movements and/or movement combinations made by the finger when touching an upper surface of the device with respective ones of said characters and/or functions prior to the beginning of said conversion step; - detecting the actual finger movements from the beginning of the movement of the touching finger until the finger is raised from the surface and regarding the session between the start of the movement till the raising of the finger from the surface as the entry of a single character and/or function; - following the detection of the finger raising step, carrying out the conversion of the previously entered elementary movement and/or 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, characterized in that a data entry region is defined on the surface or in an inner part of the hand held smart electronic device (1, 60), the data entry region being encircled by a closed boundary (7, 67) acting as a guiding path for the finger, the data entry region having a central part, a plurality of spaced special positions (8, 71-74) being provided along the boundary (7, 67), wherein the boundary (7, 67) and the special positions (8, 71-74) are designed to provide a haptic feedback sensation for the user when the finger reaches any one of them, distinguishable from the haptic sensation provided by the adjacent sections of the boundary (7, 67), wherein said elementary movements comprise either a movement of the finger from the central part of the date entry region to the boundary at one of the special positions (8, 71-74) or a movement between a special position (8, 71-74) to an adjacent special position (8, 71-74) along the boundary (7, 67) as a guiding path, wherein in said detection step the movement of the finger during the entry of a character or function is continuously sensed.