Samsung A820 Manual page 23

indicates that your phone is in vibrate only mode.
indicates that your phone is in ringer+vibrate mode.
indicates that the ringer is set at a level between
1-8 or that 1-Beep is selected.
indicates that the ringer is turned off.
shows your current battery charge strength.
(Icon shown fully charged in idle mode and
completely empty.)
indicates that position location is active.
indicates that position location is inactive.
indicates that the TTY option is on.
indicates that your phone is roaming.
indicates that your message is locked.
indicates that your phone is in Web security mode.
indicates that an alarm is set on your phone.
Section 2A: Your Phone - The Basics 15