iPhone 4s 64G white swapping for Galaxy S3 white -

I have an iPhone 4s 64G white in like-new condition, no marks or scratches. It is on Orange/T-mobile/Virgin network and comes with everything original. I am looking to swap for a Samsung S3 white 32G/64G. It must be either on the same network or unlocked. I can also swap for a 16G model with 50 cash my way. iPhone 4s 64G white swapping for Galaxy S3 white