Can I trade in an unlocked iPhone to TMobile?

Before the iPhone came to TMobile, I bought an unlocked iPhone 4S. But now I want the new Samsug Galaxy S4 from TMobile. Can I trade in my iPhone for a new galaxy since TMobile now has the iPhone?

Ya they won't know that it is unlocked and they will reset it anyways.

Only if you bought the Iphone 4s from tmobile. Then sure.

if you got the Iphone from another source, then "hell no!"