LG T-Mobile C1200 User Manual page 18

Indicates that you have a schedule for the selected day
in the schedule menu.
Indicates that you have set alarms.
Indicates that you can go to the vibration ringer menu.
Indicates that you can go to the activate Silent profile
menu.
Indicates that you can go to the General profile menu.
Indicates that you can go to the Loud profile menu.
C1200 User Guide