UTStarcom GPRS748 User Manual page 20

Call Functions
Sending DTMF Tones
Each time you press the keys, your phone sends out DTMF (Dual Tone
Multi-Frequency) which are set at the factory. DTMF tones are required
to use electronic phone services, such as bank-by-phone or Voice Mail.
If you do not want to annoy the other person by DTMF
tones when pressing the keys during a call, take the
following steps to mute them:
1
During a call, press the
2
Press the or key to scroll to DTMF Off.
3
Press the soft key.
To reactivate your DTMF tones:
1
During a call, press the
2
Press the or key to scroll to DTMF On.
3
Press the soft key.
soft key.
soft key.
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Using the Message Service
Your phone receives an incoming message during a call. You can read it
immediately without disconnecting the call. You can also send a
message during a call.
1
During a call, press the
2
Select the Message option and press the
The phone enters the Message menu. For details about using the
message service, see page 59.
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soft key.
soft key.