Xperia S - iPhone 4S !

Hi, i have a mint condition fully boxed and unlocked white 32gb Xperia S and im looking to sell or swap for an iPhone 4S in same condition and officially unlocked or Vodafone. Phone is fully boxed and 5-6 weeks old reason for sale/swap is i had an iPhone before prefer it for managing my music. May travel within reason. No spammers or sending anywhere. Cheers