I originally submitted a review with one star but that was because I was under the assumption that the first film (back) needs to be adhered to the screen 100% before removing the front film. Once I was fed up trying to smooth the entire screen protector with the front film still on, I removed the front film just to see what will happen and it immediately adhered to the screen.So, for those who buy this in the future. Remove the back, smooth as much as you can out - don't worry if the corners don't stick immediately - and then remove the front film. It should then adhere completely, and you can then work out the air bubbles.Air bubbles you see are the debris that snuck in there after 10 minutes of me constantly working at it with the front film still on. I did as best I could and it still came out well.