First, the screen has a yellow tint. I haven't used an iPhone in about a week (it was stolen). I just got this and right away I noticed the screen has a yellow tint. And then I noticed this imperfection beneath the glass, above the LCD panel. I don't know what it is or what's causing it. My macro mode isn't that good, but it's looks like when a piece of film has bubbles. Like a screen protector with an air bubble. Should I take it back?