Internet On Iphone WI0-FY conection
When you use any Internet enabled application, iPhone does the following in order until connected:
Connects over the last Wi-Fi network you used that's available.
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Wi-Fi
- Wi-Fi is often faster than cellular data networks. Wi-Fi networks cover limited areas. iPhone can join AirPort and other Wi-Fi networks at home, at work, or at Wi-Fi hot spots around the world.
When iPhone is connected to a Wi-Fi network, the Wi-Fi icon in the status bar at the top of the screen shows connection strength. The more bars you see, the stronger the connection. - To see all the Wi-Fi networks in range, from the Home screen choose Settings > Wi-Fi. Tap a network to join it.
- Many Wi-Fi networks can be used free of charge, and some require a fee. To join a Wi-Fi network at a hot spot where charges apply, in most cases you can open Safari to see a webpage that allows you to sign up for service.
Note: iOS devices sold in China may use the term Wireless LAN (WLAN) instead of Wi-Fi. Not all China iPhone models support WLAN; see this article for more information.
Cellular data networks
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If you're outside your carrier's network, you may be able to use a cellular data network from another carrier. Roaming charges may apply.
Note: If not on 3G, while iPhone is actively transferring data over the cellular data network—downloading a webpage, for example—you may not be able to receive calls. Incoming calls may go to voicemail.
Note: If not on 3G, while iPhone is actively transferring data over the cellular data network—downloading a webpage, for example—you may not be able to receive calls. Incoming calls may go to voicemail.