Google Galaxy Nexus Android mobile technology platform 4.0 Users Guide - Manual (Page 53)

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Options during a call
During a call, you can
G Answer another incoming call: You see the Incoming Call screen, displaying the caller ID and any
additional information about the caller that you've entered in People. As with any incoming call,
touch the white phone icon and slide to answer, respond with a text message, or send the call to
voicemail.
If you answer, the first call will be put on hold. If you respond with a message or send to voicemail,
you return to the first call.
G Adjust the volume: Use the volume buttons on the side of the phone.
During a call, you can also use buttons near the bottom of the screen to
G Switch to the dialer, for example to enter a code.
G Controls the audio output as follows:
If a Bluetooth headset is not connected: Turns the speakerphone on or off.
If a Bluetooth headset is connected: Functions as a 3-way switch between the built-in earpiece, the
speakerphone, and the headset. The icon changes to indicate the current output. Touch & hold to
see a 3-way menu.
If a wired headset is plugged into the phone, it replaces the phone's built-in earpiece.