ok so i am already in a two year agreement with ATT. my agreement expires in feb 2009 my question is that would i have to extend my contract another two years if i want to buy an iphone, or can i just add an iphone data plan to my existing account. other words, i dont want to extend my contract for 2 more years. i still want it to end on feb 2009, and just add the data plan for an extra 20 a month. is that possible?