The following step-by-step guide will help you enable full Internet Tethering option in iPhone 3G and iPhone 3GS running the new iPhone firmware 3.1.2. Last week we posted a method to enable Internet Tethering which relied on a third party app called MyWi. While that method was good, the downside to it was the price tag that it carried. But now with the following guide based on the hack found by Dev-Team, you can enable Internet Tethering without having to pay a penny for any third party app.
Note for Windows Users: This guide is for Mac OS X users only. Windows users can follow the alternate guide posted here.
Note for iPhone 2G Users: To enable Internet Tethering, iPhone 2G users should follow the alternate guide posted here.
Here’s what you have to do in order to enable tethering on your iPhone: