I have used this brand on other devices before and had no problems. They are more difficult to install correctly, but personally I can do it without any problems. The problem with this product is that the surface feels sticky, interferes with using the stylus and makes the screen less sensitive to touch. The point is that DUO has no sensitivity adjustment. I ended up taking them off and realizing that the DUO just can't be mounted with a protective film and everything works as it should.
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