User Guide
Select a carrier for phone calls: Choose Carrier and select the network you want to
use.
Once you select a network, iPhone uses only that network. If the network is
unavailable, “No service” appears on the iPhone screen and you can’t make or receive
calls or visual voicemail, or connect to the Internet via cellular data network. Set
Network Settings to Automatic to have iPhone select a network for you.
Fetch New Data
This setting lets you turn Push on or o for MobileMe, Microsoft Exchange, Yahoo!
Mail, and any other “push” accounts you have congured on iPhone. Push accounts
automatically deliver new information to iPhone when new information appears
on the server (some delays may occur). You might want to turn Push o to suspend
delivery of email and other information, or to conserve battery life.
When Push is o and with accounts that do not support push, data can still be
“fetched”—that is, iPhone can check with the server and see if new information is
available. Use the Fetch New Data setting to determine how often data is requested.
For optimal battery life, don’t fetch too frequently.
Turn Push on: Tap Fetch New Data, then tap to turn Push on.
Set the interval to fetch data: Tap Fetch New Data, then choose how often you want
to fetch data for all accounts.
To conserve battery life, fetch less frequently.
Set fetch or push settings for individual accounts: In Fetch New Data, tap Advanced,
then tap an account.
Setting Push to OFF or Fetch to Manually in the Fetch New Data screen overrides
individual account settings.
Sounds and the Ring/Silent Switch
Switch between ring and silent mode: Flip the Ring/Silent switch on the side of
iPhone.
When set to silent, iPhone doesn’t play any ring, alert, or eects sounds. It does,
however, play alarms set using Clock.
Set whether iPhone vibrates when you get a call: Choose Sounds. To set whether
iPhone vibrates in silent mode, turn Vibrate under Silent on or o. To set whether
iPhone vibrates in ring mode, turn Vibrate under Ring on or o.
104 Chapter 8 Settings