i first bought the 3GS three years ago with a two year contract. When the 4 came out, I bought it off the market to preserve my upgrade. Now that the 5 is coming out, I plan on renewing my two year contract to get it for the $299 price (32GB). I'm a bit confused on how this works however. I plan on pre-ordering the moment it's up. I'm currently on AT&T Unlimited data plan. If I renew my contract, will I still be able to keep it? What if I want to get 4G? I'm just confused if on how this works. Do I keep my unlimited, what if I end up wanting 4G down the road, etc.