Sony Ericsson V800 사용자 가이드

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Tone signals
You can use telephone banking services or control an answering machine by sending 
tone signals (also known as DTMF tones or touch tones) during a call.
• To send the tones, press the keys 
 - 
 or 
.
• To clear the screen after the call is finished, press 
.
• To turn the tones on or off during a call, press 
 in standby and select 
Turn off tones or Turn on tones.