Blackberry 9790 for swaps.. ?

I have a brand new blackberry 9790 on all networks, brilliant condition, comes with charger, USB lead and box.. Want to swap for a iphone 4 or 4s, preferr it to be on 02.. Or unlocked, will put some money on top off the phone as well depending on the condition and memory size of the iphone.. Please contact me on 07595454853