Samsung Byline SCH-R310 - Manual (Page 12)

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3. Speakerphone / Push-To-Talk (PTT) Key — In Standby
mode, pressing this key launches the ChatLINK screen,
enabling PTT operation.
In Standby and Call modes, pressing and holding this
key toggles your phone in/out of Speakerphone mode.
In PTT mode, pressing and holding this key enables you
to talk (release to listen).
4. Power / Accessory Connector — Used to plug in
charging accessories and to connect a headset or any
available accessory cables to your phone.
Open View (Front) of Your Phone
Features
1. Earpiece / Speaker — Lets you hear ringing and alert
tones, alarm tones, and the other parties to calls.
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