not transmit the key tones. It allows you to press keys without hearing any key tones during calls.
To communicate with answering machines or computerised telephone systems, you must select the [DTMF On] option.
To turn DTMF tones off or on
Press the [Option] Soft key then the [DTMF Off] or the [DTMF On] option.
Reading or writing a message during a call
You can read or write a message during a phone call.
❶Press the [Option] Soft key.
❷Press the [u] or [d] scroll key to highlight the
[Messages] option then press the [Select] Soft key or [o] key.
•To read a received message, select the Inbox subcommand then scroll to the message that you want to read.
•To write a new message, select the Write New subcommand then press the [o] key. (For further details, see Write New on page 40.)
Options during a call 
To switch to a Bluetooth headset or hands free kit during a call
This function is available when a Bluetooth headset or hands free kit is connected during a call.
To switch to a Bluetooth headset or hands free kit
Press the [Option] Soft key then press the [Retrieve Call in
Headset/Handsfree] option.
To switch back to your phone during a call
Press the [Option] Soft key then press the [Retrieve Call in Phone] option.
NOTE: While you are on a call using your mobile phone, you can also press a button on the Bluetooth headset or hands free kit to talk using the headset or hands free kit.
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