If you have installed any apps that uses your camera, then better sort them out. They may be the culprit that causes the "Warning: Camera Failed" message in your Samsung Galaxy phone. I don't know if it happens in other android devices, but still this will serve as a precaution. This normally happens when an app doesn't handle properly the camera, or never release its use in it after you close that app. In my case, i figured out that the security app I installed in my samsung galaxy w bugs my camera. The security app has a feature which you can remotely take photos on your phone, just using a web browser. I was so glad that it has this feature, not until when I am going to take a photo myself on the phone, it shows the message "Warning: Camera Failed". It resolves by rebooting the phone, but after a while, its back to the error. I searched for some solutions in the web, and finally read about a post telling the users that a certain photo capture app is the culprit for that error message. It just gave me the idea that I should sort out those apps that uses my phone's camera. And there it is... I figured out that one of my apps installed that uses the camera is causing the error. The irony is, it is a security-featured app. It's a popular free feature-packed app in the market that showcase abilities on tracking your lost android phone. In fairness, it really do what it has advertised, but it's still buggy, and it includes it's handling of camera. Anyway, I hope I was able to help you and gave you an idea on how to solve the Camera Failed problem.
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