First off let me say that I've been on this site for a while but just recently registered. Looking forward to chatting with you all. But I have a question that I hope you experts could answer. I looked around ATT and google and couldn't find an answer. So I had an iPhone 3G with an unlimited data plan for ATT before they took off the data plan. I just upgraded to an inspire 4G and asked to have unlimited data for it and I now have the unlimited data. Will I be able to use mobile tethering since i have unlimited data or will it mess up their system and charge me or something? Thank you so much.