I've been having camera focusing problems for a while now with my AT&T L830. It doesn't happen all the time but most of the time when I open the camera app, the focus is stuck and it doesn't actually focus on anything. Everything is blurry and it doesn't want to auto focus. Even when I go into the manual focusing mode (using the controls at the top of the camera screen) and use the focus slider nothing happens. I'm thinking it's a hardware/firmware issue because other apps can't focus either, I'll try and scan a barcode using the Amazon app and everything is blurry and it wont focus.
The really strange thing is sometimes the camera does focus and I have no idea why it gets stuck and then sometimes works. Turning the phone off and then on doesn't seem to fix it, neither does a soft reset. It'll just randomly focus sometimes and it'll be stuck other times.
It's super frustrating and something that I hope will get fixed soon.