Apple Cell Phone Apple iPhone 3G User Manual

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Reset your usage statistics: Choose General > Usage, then tap Reset Statistics to clear
the data and cumulative time statistics. The statistics for the amount of time iPhone
has been unlocked and in standby mode aren’t reset.
Network
Use Network settings to congure a VPN (virtual private network) connection, access
Wi-Fi settings, or turn Data Roaming on or o.
Turn 3G on or o (GSM models): Choose General > Network, then tap to turn 3G on
or o.
Using 3G loads Internet data faster in some cases, but may decrease battery
performance. If you’re making a lot of phone calls, you may want to turn 3G o to
extend battery performance.
Turn Cellular Data on or o: Choose General > Network, then turn Cellular Data on
or o.
If Cellular Data is turned o, you won’t be able to access the Internet unless you join a
Wi-Fi network. By default, Cellular Data is turned on.
Turn Data Roaming on or o: Choose General > Network, then turn Data Roaming
on or o.
Data Roaming turns on Internet and visual voicemail access over a cellular data
network when you’re in an area not covered by your carrier’s network. For example,
when you’re traveling, you can turn o Data Roaming to avoid potential roaming
charges. By default, Data Roaming is turned o.
Turn Personal Hotspot on or o: Choose General > Network > Personal Hotspot,
then turn Personal Hotspot on or o.
See “Personal Hotspot” on page 24.
Add a new VPN conguration: Choose General > Network > VPN > Add VPN
Conguration.
VPNs used within organizations allow you to communicate private information
securely over a non-private network. You may need to congure VPN, for example,
to access your work email on iPhone.
iPhone can connect to VPNs that use the L2TP, PPTP, or Cisco IPSec protocols. VPN
works over both Wi-Fi and cellular data network connections.
Ask your network administrator which settings to use. In most cases, if you’ve set up
VPN on your computer, you can use the same VPN settings for iPhone.
Once you enter VPN settings, a VPN switch appears in the Settings menu that you can
use to turn VPN on or o.
VPN may also be automatically set up by a conguration prole. See “Connecting to
the Internet” on page 22.
193
Chapter 25 Settings

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