Apple iPhone 4G - Manual (Page 71)

When Call Forwarding is on, the call forwarding ( ) icon appears in the status bar
(GSM models). You must be in range of the cellular network when you set iPhone to
forward calls, or calls won’t be forwarded.
On a CDMA model, you turn call forwarding on or off by dialing special codes.
Turn on call forwarding (CDMA model): Enter *72 on the Phone keypad, followed by
the number you’re forwarding calls to, then tap Call.
Turn off call forwarding (CDMA model): Enter *73 on the Phone keypad, then tap Call.
Call Waiting
Call waiting lets you know if you receive another call when you’re on the phone. You
can ignore the incoming call, put the current call on hold and answer the incoming
call, or end the current call and answer the incoming call. If call waiting is off when
you’re on the phone, incoming calls go directly to voicemail.
On GSM models, use the Call Waiting setting to turn call waiting on or off.
Turn call waiting on or off (GSM models): In Settings, choose Phone > Call Waiting,
then turn Call Waiting on or off.
On a CDMA model, call waiting is on by default. You can disable call waiting for a call
by entering a special code before dialing the number.
Disable call waiting during a call (CDMA model): Enter *70, then dial the number.
To disable call waiting for a subsequent call, you must again enter *70 before dialing
the number.
Caller ID
Caller ID displays your name or phone number to the person you call, if the recipient’s
equipment has that capability and you haven’t blocked caller ID on your phone service.
Note: When you make a FaceTime call, your phone number is displayed even if caller ID
is turned off or blocked.
On GSM models, use the Show My Caller ID to turn caller ID on or off.
Turn call ID on or off (GSM models): In Settings, choose Phone > Show My Caller ID,
then turn Show My Caller ID on or off.
On a CDMA model, caller ID is on by default. You can block your ID for a call you’re
making by entering a special code before dialing the number.
Disable caller ID for a call (CDMA model): Enter *67, then dial the number.
71 Chapter 5 Phone