I have the same problem. It changed a little with the latest update (it vibrates less, but it still can't focus), and it comes and goes, but about half the time I can't use zoom or live focus. It seems to have to do with the secondary camera that's used for zooming. I took it to the T-Mobile store and they said it should be replaced, but this is happening to so many people it makes me wonder if Samsung messed something up in software.
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