I'm having the same issue with my camera after upgrading to iOS8.3. The back camera suddenly doesn't work, but the front cam does. And, when you try to flip the camera, you get a black screen that does nothing else. So yesterday, I called "Customer Support". The representative told me she hadn't heard about this problem at all. So, I directed her to this page and many more explaining this problem. Then, after an hour of resetting, backing up, and various futile attempts to get tha camera working, the representative was told by her superiors that the problem ALL of these people were having with their cameras after upgrading to iOS8.3 "had nothing to do with the upgrade. And, was purely coincidental". Then, she tried to set me a "fix" appointment, in which I would have to pay for the fix. BAD bad bad move, Apple! In your weak attempt to "pass the buck", you showed me that you, like so many other American corporations, lack integrity and honesty. I would've been satisfied with, "Yes, many people have reported this problem and we're doing what we can to resolve this issue....Thank you for your patience.", but no....you chose the lame route, instead. TODAY, I'm buying a Samsung Galaxy! Peace out, Apple! Try NOT LYING the people that MAKE you!