Samsung SPH-A640 Phone Manual page 12

1: Main Display
Flip Open
8 seconds
2: Keypad
Flip Open
8 seconds
3: Pwr Save Mode
On
4: Brightness
Lowest
High
2: Sounds
1: Ringer Type
1: Voice Calls
1: With Caller ID
2: No Caller ID
2: Messages
1: Voicemail
2: Text Message
3: Picture Message
3: Schedule
2: Volume
1: Ringer
Ringer Off
Always Vibrate
2: Speakerphone
Level 1 – 8
3: Text Message
Use Ringer Vol.
vi
30 seconds 15 seconds
30 seconds 15 seconds
Off
Off
Low Med
Highest
1-Beep Level 1 – 8