Can you trade a white Iphone 4 for a Black Iphone 4 at the verizon or apple store?

I have had my phone for like a year and a half or so and I was wondering if I could trade my Iphone 4 which is white for an Iphone 4 that is black. There's nothing wrong with the phone, it is in perfectly good condition, I just like the black one so much better. I was hoping I could do this at the verizon store or the Apple store. If anyone knows, please let me know.

Yeah i love black iphones, they look much fresher and better in my opinion. But to answer your question, they won't do it. Your best bet is to sell it on ebay and use the money to get a black one.