SWAP MY HTC ONE X 32GB IN WHITE MINT CONDITION FOR IPHONE 4S *

I want to swap my HTC One x which is in mint condition for an iphone 4s my htc is unlocked to all networks and comes fully boxed with charger etc. the 4s must be on o2 or factory unlocked and in mint condition i will also pay cash towards swap aswell. please nothing else to swap apart from iphone and may concider s3 text for more info