Cellular Data Network Access

3G, EDGE, and GPRS 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 , EDGE , or GPRS  icon in the status bar at the top of the screen.

NOTE: If you don’t have a 3G connection, 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.

Turn 3G on: 

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 Data Roaming is turned off.