Apple iphone 3g 16gb Guida Utente

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Chapter 8 
Settings 
101 
When iPhone is joined to a Wi-Fi network, the Wi-Fi 
icon in the status bar at the top 
of the screen shows signal strength. The more bars you see, the stronger the signal. 
Set iPhone to ask if you want to join a new network:  Choose Wi-Fi and turn “Ask to 
Join Networks” on or off. 
When you are trying to access the Internet, by using Safari or Mail for example, and 
you are not in range of a Wi-Fi network you have previously used, this option tells 
iPhone to look for another network. iPhone displays a list of all available Wi-Fi networks 
that you can choose from. (Networks that require a password appear with a lock 
icon.) If “Ask to Join New Networks” is turned off, you must manually join a network 
to connect to the Internet when a previously used network or a cellular data network 
isn’t available. 
Forget a network, so iPhone doesn’t join it automatically:  Choose Wi-Fi and tap 
next to a network you’ve joined before. Then tap “Forget this Network.” 
Join a closed Wi-Fi network:  To join a Wi-Fi network that isn’t shown in the list of 
scanned networks, choose Wi-Fi > Other and enter the network name. If the network 
requires a password, tap Security, tap the type of security the network uses, and enter 
the password. 
You must already know the network name, password, and security type to connect to 
a closed network. 
Some Wi-Fi networks may require you to enter or adjust additional settings, such as a 
client ID or static IP address. Ask the network administrator which settings to use. 
Adjust settings to connect to a Wi-Fi network:  Choose Wi-Fi, then tap 
next to a 
network. 
VPN 
This setting appears when you have VPN configured on iPhone, allowing you to turn 
VPN on or off. See “Network” on page 104. 
Carrier 
This setting appears when you’re outside of your carrier’s network and other local 
carrier data networks are available to use for your phone calls, visual voicemail, and 
cellular network Internet connections. You can make calls only on carriers that have 
roaming agreements with your carrier. Additional fees may apply. Roaming charges 
may be billed to you by the carrier of the selected network, through your carrier. 
For information about out-of-network coverage and how to enable roaming, contact 
your carrier or go to your carrier’s website.