Sony Ericsson V800 User Manual page 64

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.
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