Samsung galaxy grand prime User Manual page 79

Add call : Tap to initiate a conference call.
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After the second call is placed, tap Merge to join the two calls (conference).
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Extra volume
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Bluetooth : Route the phone's audio through a connected Bluetooth headset (On) or through
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the speaker (Off).
When the call is routed to a Bluetooth headset, the current call area shows the Bluetooth
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icon.
Note: The Bluetooth button is activated to show the current call is routed to the connected Bluetooth
headset.
To route the current call back to the phone, tap Bluetooth to temporarily use the phone.
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Tap it again to route the call back to the connected Bluetooth headset.
When Bluetooth or the Bluetooth headset is turned off, the call is routed through either the
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earpiece or speaker.
Speaker : Route the phone's audio through the speaker (On) or through the earpiece (Off).
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Activate Speaker to route the phone's audio through the speaker. (You can adjust the
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speaker volume using the Volume key.)
Deactivate Speaker to use the phone's earpiece.
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Warning: Because of higher volume levels, do not place the phone near your ear during
speakerphone use.
Phone App
: Increase the current volume of the call.
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