Apple IPHONE 4 16GB ( UNLOCKED ) OR SWAP Samsung galaxy s3 ?

FOR SALE Used APPLE IPHONE 4 16 GB UNLOCKED IN VERY GOOD CONDITION INCLUDING IPHONE ,DOCK CONNECTOR TO USB CABLE,USB POWER ADAPTER, APPLE EARPHONES,TOUCH SCREEN PEN,CASE & INSTRUCTIONS. I will swap for samsung galaxy s3 PLEASE CALL JACKIE FOR ANY FURTHER INFORMATION ON 0208 391 1036 or 07846216893 Buyer to collect