Internet tethering was a feature introduced in iPhone OS 3.0 and is supported by many international carriers. It allows users to share their iPhone's 3G internet connection to other devices such as their laptops over Bluetooth or USB. AT&T, however, has been slow to roll out the feature to its customers due to concerns about increasing strain on their networks. iPhone 4.0 is due for public release this summer.
我想這是吉米大你的圖片來源吧
這裹沒提到把Wifi用作Tethering...
