LG C1100 - Manual (Page 15)

Overview
15
Key Description
Up/Down Side Key
On closing a flip, when you press this key sequently,
time, date, my display, and greeting note is
displayed respectively. If you press this key once,
time is displayed. It will show up depending on
setting “Show time”.
Key Description
You can delete the characters, go back the menu.
In addition, you can view voice memo list when you
press this key shortly in a standby mode.
Side of the Key
C