I actually kicked mine across a parking lot one night because I was drunk and am an idiot. Anyways, like I said, I haven’t put a case on mine and although it’s not pretty anymore, I’ve never had a trouble out of it.
My roommates quit ringing and vibrating when he dropped it and his has actually dented so bad that he had to hammer the dent back into place. This was after he got it replaced because some rain caused water damage. There is also a spot in the middle of his screen that won’t respond to touch anymore. It’s right where you type in the URL in safari so his internet usage is out the window sense then.