Since the F3 had only two lines of fixed icons on the top and bottom of the display, as well as one line of six 14-segment characters and another line of six 7-segment numbers available on its display, the user interface was very different from the usual menu structure normally found on mobile phones. The only thing resembling a (flat) menu was accessed by pressing left/right on the central button: It allowed writing an SMS, reading a saved SMS, call history, choosing the ringtone (out of seven melodies), setting date and time, and setting the alarm clock. The menu was visualized by fixed icons in the bottom row, following the left/right pattern of the navigation button.