First, I have developed a stuck pixel, in the upper half, middle of the screen. Stuck on red. Never had a bad pixel on a phone. Is this sufficient to get a replacement? Second, It has developed a 1-2 second pause when close out of any app. This goes away when I reboot only to slowly reappear. There's NO lag in starting an app, or scrolling, or using apps, just in closing. Anyone else experience this or know anything about it?