How do I use iPhone 3G as a modem to my computer ?

I'm using an iPhone 3G version 4.2.1 I wanna use it as an Internet modem to my computer. But there is no option like "Data Tethering" or "modem" in network settings. Can't I use it as a modem ?
Answer:

You need 2 things. 1) your phone must support "tethering" as that is the technology that makes the magic happen, and 2) permission from your phone company (AT&T). To make #1 happen you need IOS 4.x. It supports tethering. To make #2 happen you need to call AT&T and have them add tethering to your plan. It costs extra per month. It is my understanding that Verizon will allow their version of the iPhone to act as a wireless hot spot.

Mozammel at Yahoo! Answers Visit the source

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Other answers

If there is not a hotspot button, and a wifi attachment you will be unable to do that. Thats why I switched to Tmobile. Way better phones than that crap iPhone.

Christina S

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