Apple iPhone OS 3.1 - Manual (Page 154)

Calling from Abroad
Set iPhone to add the correct prefix when dialing from another country: In Settings,
tap Phone, then turn International Assist on. This lets you make calls to your home
country using the numbers in your contacts and favorites, without having to add a
prefix or your country code. International Assist works for U.S. telephone numbers only.
For more information, see “Using iPhone Abroad” on page 56.
Call Forwarding
You can set iPhone to forward incoming calls to another number. For example, you
may be on vacation and want all calls to go somewhere else. If you’re going to an area
with no cellular coverage, you may want to forward calls to a place where you can be
reached.
Set iPhone to forward your calls:
1 Choose Phone > Call Forwarding and turn Call Forwarding on.
2 Tap Forwarding To and enter the phone number you want calls forwarded to.
When Call Forwarding is on, an icon appears in the status bar the top of the screen.
You must be in range of the cellular network when you set iPhone to forward calls, or
calls won’t be forwarded.
Call Waiting
Activate or deactivate call waiting: Choose Phone > Call Waiting, then turn Call
Waiting on or off. If you turn call waiting off and someone calls you when you’re
already on the phone, the call goes to voicemail.
Show My Caller ID
Show or hide your caller ID: Choose Phone > Show My Caller ID, then turn Show My
Caller ID on or off.
If Show My Caller ID is off, people you call can’t see your name or phone number on
their phone.
Using iPhone with a Teletype (TTY) Machine
In some regions, Teletype (TTY) machines are used by deaf or hearing-impaired people
to communicate by typing and reading text. You can use iPhone with a TTY machine
if you have the iPhone TTY Adapter cable, available for purchase separately in many
countries. Go to www.apple.com/store (not available in all countries).
Connect iPhone to a TTY machine: Choose Phone, then turn TTY on. Then connect
iPhone to your TTY machine using the iPhone TTY Adapter.
For information about using a TTY machine, see the documentation that came with
the machine.
154 Chapter 19 Settings