Samsung SCH-3550 - Manual (Page 38)

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You can set the Minute Beep option to sound an alert 10
seconds before each elapsed minute to remind you of the
length of the current call.
To turn Minute Beep on and off:
1. Press to display the Main Menu in Standby mode
before placing the call.
2. Press for Sounds.
3. Press for Alerts.
4. Press for Minute Beep.
5. Press the scroll keys to toggle between On / Off.
6. When the desired option displays, press to save the
setting.
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You can mute the microphone during conversation by selecting
the Mute option from the In Use Menu. When Mute is active,
“MUTE” displays. The phone resets this condition to the default
Unmute setting at the end of your call.
To mute the microphone during a call:
1. During conversation, press to display the In Use
Menu.
2. Press to mute the microphone. You will hear the
other party’s conversation, but they will not hear your
conversation. “MUTE” displays on the screen.
3. To “unmute” the microphone during the same
conversation, repeat steps 1 and 2. Selecting the (Un)Mute
option toggles Mute on and off.