I have 3 original iPhones. One has a broken speaker but the screen is fine, and the other two the screens are broken. So I was wondering how hard it would be to take the working screen of off the broken speaker iPhone and put it on one of the iPhones with a working speaker but broken screen. Basically I'm asking how hard it is to take the LCD + Digitizer + LCD out with out separating them. Is this very difficult?