Iphone 4 16 GB Black Unlocked 6 months old (buy or swap) !

Hi, Selling Iphone 4. 16 GB Black Perfect condition 6 months old With boxed and all accessories. Can swap with Iphone 3G , Samsung galaxy s2, 3. or any other good smartphone. or you can buy with the listing price. Phone is fully unlocked and you can use any sim in it. Reply if interested.