Fist of all you have to make sure you have a Blackberry or iPhone to qualify for the free internet. That being said to trick AT&T you have to change your browsers User Agent. If you use FireFox download User Agent Switcher (UAS) to start the process.
Then you need to alter the UAS settings (Tools – User Agent Switcher – Options – Options – User Agents – Add) to the following:
Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543a Safari/419.3
(Make sure all of that is on one line)
and if you have a Mac in Safari 3.0 in the Preferences, Select Advanced and check the “Show Develop menu in menu bar”. A new menu item called “Develop” should appear in the menu bar. Click on that menu and select “User Agent” and then select the sub option “Mobile Safari 1.1.3 – iPhone”.
With the user agent now switched you will be directed to a landing page designed just for AT&T iPhones where AT&T is asking your for your iPhones phone number. Put in your iPhone or Blackberries number. AT&T will then send you a text message with a secure lick that you click on to activate the free wifi. Just enter that link into your browser and you have free unlimited wifi on your laptop.