We haven't tested this ourselves, but Pyrofersprojects came up with an interesting, but ultimately impractical, way to turn your iPhone or iPod touch into a 3G internet-using device. All you need is a 3G smartphone with Windows Mobile 5 or 6, a 3G data account, and the know-how to follow a guide teaching you how to set up internet sharing over Wi-Fi. After that's done, you can use your iPhone/iTouch to go through your other smartphone (which costs probably as much as your iPhone/iTouch), in order to get online. It's pretty gimpy, but at least it's 3G—and the irony of having to use a WM phone with an iPhone isn't lost on us. [pyrofersprojects]

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