The tutorial on how to enable tethering on iPhone 3gs and iPhone 3g

Here's a little guide that allows you to enable tethering on the iPhone 3G and 3GS with firmware 3.1.2. We use a hack that changes the CommCenter and eliminates the need for a digital signature for the appointing authority dedicated to the navigation on the computer, so it should be possible to reset the right data for Vodafone Pack