Apple iphone 3g 16gb Guida Utente

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Chapter 8 
Settings 
102 
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 off for MobileMe, Microsoft Exchange, Yahoo! 
Mail, and any other “push” accounts you have configured on iPhone. Push accounts 
automatically deliver new information to your computer or iPhone when new 
information appears on the server. You might want to turn Push off to suspend 
delivery of email and other information, or to conserve battery life. 
When Push is off or for 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 tap how often you want to 
fetch data for all accounts. 
To conserve battery life, fetch less frequently. 
For information on adjusting advanced account settings, see “Accounts” on page 110
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 effects 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 off. To set whether 
iPhone vibrates in ring mode, turn Vibrate under Ring  on or off. 
Adjust the ringer and alerts volume:  Choose Sounds and drag the slider. Or, if no 
song or video is playing and you aren’t on a call, use the volume buttons on the side of 
iPhone.