Samsung Galaxy Note 4 - Manual (Page 51)

Phone Calls 40
In-Call Options
While you’re on a call, you can use options to find information or multitask during the call.
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Add call: Display the Keypad to dial another call.
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Keypad: Display the Keypad, where you can enter numbers to use DTMF (Dual Tone Multi-
Frequency). This can be useful if you need to enter an access code or other information while on
a call.
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End call: Hang up the call.
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Speaker: Control whether the call audio plays through the speaker or the earpiece.
Warning: Because of higher volume levels, do not place the phone near your ear while using the
speaker.
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Mute: Control whether the other party can hear your side of the call.
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Bluetooth: Connect to a Bluetooth device (not included), or disconnect from a device.
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Tap More options for more options:
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Contacts: Launch Contacts.
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Action Memo: Launches Memo to create a memo during a call.
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Message: Launches Messages to create a new message.