Just a few hours after Apple released firmware 3.0 to the public, some smart guy already figured out a way to hack the iPhone to allow free tethering on most carriers, including AT&T. What’s even better about this hack is that you don’t have to jailbreak your iPhone.

How to enable free tethering on iPhone 3.0?

1. On your iPhone, launch Safari

2. Go to the following website: http://help.benm.at/tethering.php

3. Find your country, select your provider, and tap “download”.

4. Go to Settings > General > Network > Internet Tethering Bluetooth or USB

5. Done!

Is this legal? Well, not really… I suggest you don’t tether your iPhone too much using this hack as carriers have a way to find out and can very well overcharge you or simply disconnect you, as UK carrier 02 reportedly said it would:

Under those terms we reserve the right to charge customers making modem use of their iPhone or disconnect them.

Use with caution…