Samsung Galaxy S3 16gb in white, Unlocked... only 2 weeks old. Swop/ Px iphone 4s !

Here is my 2 week old Samsung Galaxy s3 16gb in white, Comes boxed with unused head phones ect... Comes with a pack of screen protectors, rubber s-line case and a mini stylus, Phone in new condition. Was bought Sim free so not a contract handset... Would like to swap for a I-phone 4s or will take a 4 with a little cash my way, Must be unlocked or on 3 network, Prefer white but will consider black... Any questions just text dan on: 07868527621, Please no timewasters i am in county durham so must be willing to meet...