I am tethering my iPhone to my pc for internet. I am on my brothers plan and of course have the unlimited internet plan, he said there has been a very high increase in my internet data usage. Now he knows im tethering and he would like to do the same thing with his pc. The question i have is has anyone ever gotten caught doing this?? Is there a way att can find this out?? I read everywhere online that people say it is illegal but if you have unlimited internet they cant do anything. Can anyone give me a heads up?