swap my iPhone 4 16gb for Blackberry 9900 ?

Hi there, I would like to swap my week old Iphone 4 16gb white for a Blackberry 9900, white preferably, or black if you have it. My phone comes as new, boxed with all accessories and two covers. Your phone must be in great condition like my iphone, and work on vodafone. My iphone is locked to vodafone, and Is 100% working running ios 5.1 I need a Blackberry 9900 for work, so please do not email me asking to swap any other phones/anything else. I will not reply Many thanks