Re: Does ATT use a 3G connection for data tethered to netbook? iPhone 3GS and Dell netbook question
When tethering, the best available cellular signal (3G if available, Edge/GPRS if you're not in a 3G area) is used. I really don't know if you even can tether for a wi-fi connection. I don't see why you couldn't, but the whole point is to get internet service where it's not available by other means.
The only hardware you need to tether is either a data cable for the phone or a Bluetooth device for the computer. That will connect your computer to the internet.
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