What local store will let me trade my unlocked iPhone 5s in for another color?

Box not even opened yet. What local stores such as: Walmart, Bestbuy, RadioShack, etc?

Added (1). For another unlocked iPhone 5s, just different color. I have black, I want gold.

No. They cant tell whats in the box without opening it, and once its opened, its no longer brand new. Its an opened box reduction.

Take your phone and receipt to the store you bought it from.

The might let you exchange it.