My gs3 was stolen last night with an otter box on it. It was found today without the case. It looks like whoever took it, took it out of the case and threw it against a brick wall. No scratches on the screen. The back is pretty beat up. There is only a small imperfection on the top left corner of the screen where it doesn't work anymore but it doesn't even extends past the status bar so I don't think it will be a problem. BTW, no screen protector.
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