Apple iPhone/iPhone 3G (User manual) - Manual (Page 37)

Chapter 3 Phone 37
While On a Call
When you’re on a call, the screen shows call options.
Mute your call: Tap Mute. You can still hear the caller,
but the caller can’t hear you.
Use the keypad to enter information: Tap Keypad.
Use the speakerphone or a Bluetooth device: Tap
Speaker. The Button is labeled “Audio Source” when a
Bluetooth device is available, which lets you select
the Bluetooth device, iPhone, or Speaker Phone.
See contact information: Tap Contacts.
Put a call on hold: Tap Hold. Neither party can hear
the other.
Make another call: Tap Add Call.
Use other applications during a call: Press the Home button, then tap an
application icon.
End a call: Tap End Call. If you’re using the stereo headset, you can press the mic
button instead.
Second Calls
During a call, you can make or receive another call. If you receive a second call, iPhone
beeps and shows the caller’s information and a list of options.
Note: Making and receiving second calls may be an optional service in some countries.
Contact your carrier for more information.
Respond to a second call:
 To ignore the call and send it to voicemail, tap Ignore.
 To hold the first call and answer the new one, tap Hold Call + Answer.
 To end the first call and answer the new one, tap End Call + Answer.
Make a second call: Tap Add Call. The first call is put on hold.
Switch between calls: Tap Swap. The active call is put on hold.
Create a conference call: Tap Merge Calls. See “Conference Calls” below.
Conference Calls
You can talk to more than one person at a time, and merge up to five calls, depending
on your carrier.
Note: Conference calling may be an optional service in some countries. Contact your
carrier for more information.