Blackberry curve 9300 swap for iphone *

i have a blackberry 9300 3g, black and chrome in colour, used on 02 but sure its unlocked, fully boxed and in good condition but must state there is a problem with the screen cover, it was damaged during me changing the housing but can be replaced for 2 off ebay, the lcd is fine though and this problem doesnt affect the phones use as i use everyday in life. Looking to swap for an iphone 3g , in decent condition and on o2