I wanted to get some thoughts on what I should do with my recently dropped iPhone 4? It seems to work fine, but there is a small dent in the the upper left corner of the bezel and front glass. Yesterday I noticed when tapping just to the right of the home button I was getting some clicking noises. This morning I could not duplicate the same clicking noise when tapping the screen. I need to have a good phone and was wondering if I should keep using it until it fails or go to the Apple store and replace it with a $200 out of warranty unit? Also, are these refurbished units like new?