Will apple swap my iphone 4?

the sleep button on my iphone is broken and is rapidly becoming less functional, the volume button on the side is also becoming out of use.I have dropped my iphone numerous times and there is one small crack (hardly noticeable) though it is not near any of the buttons. i know that apple exchange broken phones for free if the phone has a problem, though before i make the appointment i was wondering if apple will still exchange my phone, even with the cracks?