I've had my iPhone for 5 & 1/2 months & I'm thinking of returning it to be serviced under warranty for a couple reasons. My sleep button popped out & I'm convinced I have a bad battery. Not sure if it is every iPhone battery or if my iPhone came from a bad batch. I also have a hairline crack that starts at the middle of charger/sync port on the back, about 1" long & stops at the silver X, in the "FC X C E - !" marking. I have only dropped it once & I take good care of it. Are these reasons enough to return it under warranty? Has anyone returned their iPhone within the warranty, what should I expect? Thanks, I'd just like to get an idea or some tips before I restore it & bring it in.