Internet Tethering with your iPhone.

This is a cool tool to use with your iPhone and Mac.
It allows you to use your iPhone as a modem when you are out and about.

Set up a tethering connection:

  1. In Settings, choose General > Network > Internet Tethering.
  2. Slide the Internet Tethering switch to On.
  3. Connect iPhone to your computer:
    • USB: Connect your computer to iPhone, using the Dock Connector to USB Cable. In your computer’s Network services settings, choose iPhone.
On a Mac, a pop-up window appears the first time you connect, saying “A new network interface has been detected.” Click Network Preferences, configure the network settings for iPhone, then click Apply. On a PC, use the Network Control Panel to configure the iPhone connection.
    • Bluetooth: On iPhone, choose Settings > General > Bluetooth and turn on Bluetooth. Then refer to the documentation that came with your computer system software to pair and connect iPhone with your computer.
When you’re connected, a blue band appears at the top of the screen. Tethering remains on when you connect with USB, even when you aren’t actively using the Internet connection.

Link to Apple