Ive had my Galaxy note 3 for about 4 months now. And ive actually been having this problem for a few weeks now. When I need to use my camera and click the camera app, the camera shows up but is just black. Then about 6 to 10 seconds later, it works. Also when switching to video, instead of pressing the video to quickly switch, it takes me about 4 taps to the video button for it to finally switch. Any help with this?? Thank you.