How do i replace my broken samsung galaxy ace gt s5839i touch sc ?

iphone 4 black 32gb swap for blackberry 9900
iphone 4 black 32gb very good condition, few visible marks has small problem with a slightly sticking power button (still works fine) but apart from that its very good condition swaps for blackberry 9900 black or white but white would be preferred (cash may be given with iphone for good condition white phone), any other swaps or offers cash for the phone may be considered text me on 07875435031