About a month ago, pictures taken with my phone no longer appeared in the Gallery. Instead of the picture, there's an icon. (The icon is grey with a picture of a photo and a film negative.) This icon appears in both "Camera Roll" and "All Photos". I tried shutting the phone off and rebooting. I deleted some pictures because I thought I may have maxed out the capacity. I tried using the camera this weekend, but it wouldn't bring the camera up. It kept going back to the home screen. Today when I try to use the camera, the camera is available and it even saved the picture. The problem is sporadic, but it happens more times than not. Any suggestions?