Doubt it's a screen protector. Probably one of those gelaskin type of things. It's not that great-looking though...if you you look closely, the lines aren't even completely straight. Makes it look like the white frame was drawn on freehand
Gelaskin can make you an all white iPhone skin and then they also offer a screen protector that is the size of the screen instead of the entire front. That's probably as close as you will get.