Hey guys. I purchased an iPhone 3GS in September of 2009 on AT&T. I've been anxiously waiting the release of the new iPhone which people are speculating to be released sometime this winter. I have an Unlimited Data plan. If I choose to purchase a new iPhone at FULL NO COMMITMENT pricing without signing a new 2-year contract, could I still keep my unlimited data plan? Further, if I decide the new iPhone (4S/5, whatever) isn't up to my standards and decide to purchase an Android phone at full price without signing a new contract, could I still keep my Unlimited data plan? Thanks in advance and sorry if this question has been asked before.