My camera application has stopped working on my Samsung Galaxy S3; I tried to switch to the front camera a few days ago and it locked up saying 'Camera Failed'. Ever since I cannot use the camera and smart stay feature does not work. I did a factory reset and the camera started to work again. However, after trying to switch to the front camera it locked up again. It was working fine up until 3 days ago and has no other problems. Please could anyone assist with this? Many thanks.