User's Guide

APPLE CONFIDENTIAL — First Draft (1.10.11)
Once you join a Wi-Fi network manually, iPhone automatically connects to it whenever
the network is in range. If more than one previously used network is in range, iPhone
joins the one last used.
When iPhone is connected to a Wi-Fi network, the Wi-Fi icon in the status bar at the
top of the screen shows the connection strength. The more bars you see, the stronger
the connection.
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Cellular Data Network Access
3G, EDGE, and GPRS (GSM models) and EV-DO and 1xRTT (CDMA model) allow Internet
connectivity over the cellular network available through your iPhone carrier’s wireless
service. Check the carrier’s network coverage in your area for availability.
You can tell iPhone is connected to the Internet via the cellular data network if you see
the 3G/EV-DO ( ), EDGE ( ), or GPRS/1xRTT ( ) icon in the status bar at the top of the
screen.
Note: On EDGE and GPRS connections, you may not be able to receive calls while
iPhone is actively transferring data over a cellular network—downloading a webpage,
for example. Incoming calls then go directly to voicemail. On EV-DO connections, data
transfers are paused during incoming calls. On 1xRTT connections, incoming calls go
directly to voicemail during data transfers.
Turn 3G on: (GSM models only.) In Settings, choose General > Network and tap Enable
3G.
If you’re outside your carrier’s network, you may be able to access the Internet through
another carrier. To enable email, web browsing, and other data services whenever
possible, turn Data Roaming on.
Turn Data Roaming on: In Settings, choose General > Network and turn Data
Roaming on.
Important: Roaming charges may apply. To avoid data roaming charges, make sure
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Internet Access on an Airplane
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receivers to avoid interfering with aircraft operation. Airplane mode disables many
of the iPhone features. In some countries or regions, where allowed by the aircraft
operator and applicable laws and regulations, you can turn on Wi-Fi while airplane
mode is on, to:
Send and receive email 
Browse the Internet 
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Chapter 2 Getting Started