Well, I did this on my phone and noticed I had a lot of dead pix . Here is how you do it: 1. Go to the your backlight setting and turn it up to 100. MENU>Setting>Sound & Display>Brightness You have to disable the auto blacklight first. 2. Launch you camera app 3. Hold your finger over the camera lens and count the dead pixels I was disappointed to actually see so many. You really don't notice them during normal. Unfortunately for me, Best Buy has a cap on Sprint phones (only able to exchange 3) returned and exchanged. I have to take mines to a authorized Sprint repair store. Does anyone else have dead pixels?