Same issue here. Camera worked fine for a month or so. Definitely buzzing from the camera while trying to zoom or use live focus. My live focus feature is totally unusable and the picture quality in general has deteriorated. My wife and I both upgraded phones at the same time, I tried to get her to purchase the new galaxy, but she went with and iphone - lucky her. I'm extremely dissapointed. We moved to Indonesia and I purchased this phone to take pictures during our travels... looks like we'll be using the iphone for that.
Mine just started today. Super annoying because I was trying to get pictures of my daughter at her first play and the camera wouldn't focus. It's vibrating and making a loud buzzing noise when I zoom in any amount.