I feel like most consumers don't even know what plans they have. For example, I told my coworkers about the double data promotions from Verizon and AT&T and they couldn't even tell me if they are on a share plan. Because of this, I feel like most consumers who have an unlimited data plan just stick with it and never changed it because they don't need to or don't care. If that is the case, is it possible that a number as high as 50% represent the number of AT&T users still on the unlimited plans? If that is the case, it is no wonder why AT&T is forced to grandfather these plans. Because of all the headache involved (calling, mailing, emailing) in moving 50 million customers to a new plan.