could I change my preorder color with T-Mobile?

I pre-ordered the blue coral from T-Mobile at midnight on the first preorder day. Now I'm wondering if I just got caught up in the hype for the blue one, because I keep looking at my S7 Edge and realizing how much I love the titanium silver. Would T-Mobile allow me to call them back and change the color? And would it change my shipping date?

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