User Guide
International Calls
Making International Calls from Your Home Area
For information about making international calls from your home area, including rates
and other charges that may apply, contact your carrier or go to your carrier’s website.
Using iPhone Abroad
You can use iPhone to make calls in many countries around the world. iPhone 3GS and
iPhone 4 are multi-band phones, ensuring broad international coverage.
Enable international roaming: Contact your carrier for information about availability
and fees.
Set iPhone to add the correct prex 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
prex or your country code. International Assist works for U.S. telephone numbers only.
When you make a call using International Assist, “International Assist” appears on the
iPhone screen, alternating with the “calling …” message, until your call is connected.
Note: International Assist may not be available in all areas.
Set the carrier to use: In Settings, tap Carrier, then select the carrier you prefer. This
option is available only when you’re traveling outside your carrier’s network. You can
make calls only on carriers that have roaming agreements with your iPhone service
provider. For more information, see “Carrier” on page 187.
Important: Voice and data roaming charges may apply. To avoid data roaming charges,
turn Data Roaming o.
Turn Data Roaming on or o: In Settings, choose General > Network, then tap to turn
Data Roaming on or o. Data Roaming is turned o by default.
Turning Data Roaming o helps to avoid data roaming charges when traveling outside
your carrier’s network by disabling data transmission over the cellular network. You
can still access the Internet if you have a Wi-Fi connection. If Wi-Fi network access isn’t
available, however, you cannot:
Make or receive FaceTime video calls Â
Send or receive email Â
Browse the Internet Â
Sync your contacts, calendars, or bookmarks with MobileMe or Exchange Â
Stream YouTube videos Â
Get stock quotes Â
Get map locations Â
Get weather reports Â
Purchase music or apps Â
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Chapter 5 Phone