Samsung SGH-X640 Manual page 20

Call functions
Note: You can also scroll through Phonebook from
the beginning, by pressing the Up or Down
key.
5. To view the highlighted entry, press the OK soft
key.
For further details about the Phonebook feature,
see page 57.
Sending DTMF tones
You can send the DTMF (Dual Tone Multi-Frequency)
tones of the number on the display during a call.
This option is helpful for entering a password or
account number when you call an automated
system, like a banking service.
To send the DTMF tones:
1. When you are connected to the teleservice
system, press the Options soft key.
2. Press the Up or Down key to highlight the Send
DTMF option. Press the Select soft key.
3. Enter the number you want to send and press
the OK soft key.
The tones of the displayed number are sent.
Using the message service
You can read or write a new message during a call.
1. Press the Options soft key.
2. Press the Up or Down key to highlight the
Message option. Press the Select soft key.
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3. To read a received message, select the Inbox
option, and then scroll to the message that you
want to read.
To write a new message, select the Create
option.
4. Press the Select soft key.
For further details about the SMS feature, see
page 85.
Recording the telephonic conversation
You can record your conversation during a call.
This option is helpful to save some important
conversations for a future reference. You can find
conversation you have recorded on the Voices
menu (Memo 7.6.2). For more information, see
page 137.
Using the SIM-AT (SIM Application
Toolkit)
If you use a SAT card that provides additional
services, the SAT menu displays. For further details,
see your SIM card instructions.
Making a second call
You can make another call while you have a call in
progress, if this service is supported by your
network.
To make a call while you have a call in progress:
1. Enter the phone number that you want to dial or
look it up in the Phonebook.
Call functions
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