I am also having this same problem.
Considering I bought the phone the day it was available in stores I'm just blown away that there is an issue already with the phone. I actually have been very loyal to Samsung despite all of my friends having iPhones so its upsetting. My Asurion insurance is completely useless for this unless I lose my phone or someone steals it. I have only lost my phone twice in the many years I've had a cell phone. Anyway I just wanted to post here so that people can be aware there is some sort of issue with the phone. I had heard that the camera was an issue particularly with people who bought it through Verizon, but I assumed since I bought it through Tmobile (and it was to late I had already bought the phone) maybe I was safe. It seems that was an incorrect assumption.
Very upset with Samsung and I think this will probably make me switch over to an iPhone the next time I buy a phone.
The issue that I am having is the front facing camera is able to take pictures, but the top portion of the frame is blacked out now. I considered for a moment that maybe I had dropped the phone roughly, but I have not. I have always kept a robust case on the phone since day one and the farthest it has fallen since I've had it these two? three months? is from my lap to the floor.