Isn't that just the factory protector they all get sent out with? There are some on the very edge of the glass and one over the glass around the camera and fingerprint sensor i think. From what I've heard they don't really last long like an actual screen protector would. I have T-Mobile too though so nothing too compare to, but every new phone I've gotten has that as far as i know.
Looks like AT&T got the shaft. It had a film on it, but it had text and drive warning on it.