Please read it carefully before you purchase it, thanks.
1.As for the full size films, it just has glue around the edge,the middle part has no glue. So when you install it, you must be very careful about it. 
2.Before you install the films,please make sure the screen is very clean, and no dust. 
3.When you install the films,please check all the holes and edges well, then make sure it is perfect fit on the screen.
4.After you install it well, please press the edges glue for many times, then it can be sticked firmly and perfect fit on the screen. 
5.Here we all have tested it on the real phone for many times, if you do not install it as above ways, then it will lead that the films are not perfect fit on the screen, then it will appear this problem that the sensitivity is not good for some places.