Samsung SGH-T539ABBTMB - Manual (Page 36)

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For further details about the Phonebook feature, see "Contact List" on page 54.
Send DTMF
You can use the Send DTMF option to send a key string or number during a phone
call. For example, you can send a calling card number by DTMF while on a call.
1. Press the Options soft key.
2. Highlight the Send DTMF option and press the Select soft key or the
key.
3. Enter a number and press the OK soft key. The number sends.
Message
This option causes the Messages menu to display on the screen. You can use this
option to send, receive, and review text and picture messages. For more information,
refer to "Messages" on page 63.
Menu
This option places your phone in main menu mode without interrupting the call in
progress. You can use this option to access many of your phone’s features during a
call.
Using the Speakerphone
While on a call, you can use your Speakerphone by following these steps:
Note: The Speaker on soft key option is not available if the headset is currently enabled.
1. Press the Spkr on soft key to turn the Speakerphone on.
2. To turn the Speakerphone off, press the Spkr off soft key.
Important!: For safety information related to speakerphone use, see "Responsible Listening" on page 156.