Tethering doesn’t officially work in iPhone 3.0 for AT&T customers, but for Mac users there’s an easy tweak to enable the feature in seconds.
Here are the steps, courtesy of MacMegasite:
1. Download this carrier update file. Then extract it.
2. Launch the Terminal app and type the following command:
defaults write com.apple.iTunes carrier-testing -bool TRUE
3. Now launch iTunes. In the iPhone window, hold the Option key while clicking Restore. Then select the ipcc file in the disk image you downloaded and click OK.
4. iTunes will update the carrier settings. Now under General settings, tap the Network tab and an internet tethering option should appear. From there on, you should be able to easily tether the iPhone via Bluetooth or USB.
We tested this trick on an original iPhone as well as an iPhone 3G, and unfortunately the technique only worked on the iPhone 3G.
We’re somewhat shocked about how easy this was, and we’re guessing it will disappear very soon: It’s highly unlikely AT&T is going to let us tether for free. But for now, enjoy it!
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