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How to enable tethering with iPhone 3.0

??Apple’s Scott Forstall mentioned that Gizmodo has posted a tutorial on how to enable the hidden 3G data tethering in the developer builds of iPhone OS 3.

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Apple’s Scott Forstall mentioned that Gizmodo has posted a tutorial on how to enable the hidden 3G data tethering in the developer builds of iPhone OS 3.0.

It's as simple as installing a 36KB file called "ATT_US.ipcc" on the iPhone (running 3.0) then flipping a new "Internet Tethering" switch in Settings > General > Network.

The problem is the fine print. Gizmodo warns that tethering over Bluetooth (rather than USB) only works with older hardware and not with the unibody MacBooks, for example.

A Gizmodo reader warns of other potential problems with the hack including issues with MMS, voicemail and billing. AT&T could bill you retroactively for usage.