Task Manager; Theme; Sound - Samsung SCH-I839 User Manual

Setup
CPU: you can check information on the CPU type and
usage.
Task Manager shows applications that is currently running.
You can activate an inactive application or close
unnecessary applications to save battery power or speed up
data processing.
• To activate an application, tap Menu → Activate.
• To close an application, tap Menu → End.
• To close all applications, tap Menu → End All.
You can change the display theme. Select one of five colour
patterns and tap Apply.
You can change various sound settings.
Volume: you can adjust the volume level for system
sounds, callers' voices, the call ringer, and recording.
Ring tone: you can change the ringer settings.
• Ringer type: allows you to select a ringer type.
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Task Manager

Theme

Sound

Ring: the phone plays the selected rintone.
Ring Silent: the phone just turns the backlight.