Samsung SPH-M840 User Manual page 42

Other call settings
1. From the Home screen, touch
2. Touch Menu
3. Configure options:
• US dialing: When enabled, the phone will
automatically replace "+" with the international
dialing code, except when you dial "+1".
• International dialing: When US dialing is
disabled, enter an international dialing code.
• TTY mode: Choose a TTY mode to enable TTY
mode, for use with optional TTY equipment.
• DTMF tones: Set the length of Dual-tone Multi-
frequency tones, which play when you use the
keypad during a call, such as when navigating
phone menus.
• DDTM: When enabled, you can make and
receive voice calls or use voicemail while using
mobile networks.
• Voicemail settings: Configure options for
Voicemail.
• Voice privacy: When enabled, Enhanced privacy
mode is used to increase the security of call
audio.
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Phone.
Call Settings.