Hi there! I accidentally dropped my iphone 3GS from the table on its side and now it is cracked. However, everything seems fine; the screen still functions perfectly when I touch them. The only thing is that the screen cracks which doesn't look nice. So, do I need to buy a digitizer along with the outer glass screen?I read somewhere that the digitizer converts analog signal into digital one. But since my touch screen still works perfectly, do I still need to replace it? Thank you very much in advanced!I tried searching on googles and on the forum but cant seem to get my question answered. What do I need to buy to replace it?