I want a 32GB model after analyzing my possible future usage. However, my stupid self went to the Genius Bar today to warranty replace my iPhone for dust under the screen. After getting home, I realized that this might screw everything up when I could have just returned/exchanged it for a new one. But, what is done is done. Now, I am wondering if it is even possible to exchange it? I am definitely within the return period but this isn't the "original" phone.