Tethering the ipad 2 to iphone 4
This is an question that has been asked before but I would like to get the most current and correct response. I have an iphone 4 with IOS 5.0.1 and a grandfathered AT@T plan with unlimited data. I am anticipating purchasing an ipad 2 next week. To tether the ipad 2 to the iphone 4 do I need to need to purchase the AT@T telephone with 3G? And also, can I do this without paying AT@T any more money for an extra data plan, personal hot spot, etc.?