Samsung Galaxy S9 User Manual page 126

Actions While On a Call
You can adjust call volume, switch to a headset or
speaker, and even multitask while on a call.
Adjust the Call Volume
Press the Volume keys to increase or decrease
u
the volume.
– or –
Tap More options > Turn on extra volume to
quickly add more volume to the incoming audio.
Apps
Switch to Headset or Speaker
Listen to the call using the speaker or through a
®
Bluetooth headset (not included).
Tap Speaker to hear the caller using the
u
speaker.
– or –
Tap Bluetooth to hear the caller using a
Bluetooth headset.
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