I noticed yesterday that my camera will not let me switch to the front facing lens. It is in "selfie" mode only. I tried adding a new camera app, but no luck. I've uninstalled the camera updates, cleared the cache, restarted my device; nothing works. Any suggestions? I really don't want to take it back to the factory settings if I can help it. If I do have to reset the device, what will happen to all my apps (and their data)?