It is debatable whether it makes sense to make the crisp display some matter through the film. Outside and especially in sun it's nice that the image is easier to see than on the mirror display. The films are perfectly tailored and relatively easy to install. If however, is only a speck of dust on the screen is no longer to prevent an air bubble. So you should use the enclosed cloth and wipe the screen well. I have used on all mobile phones an antireflection film, and will continue to do so. However, there are films that make the picture very pixelated and blurry, this is only limited to the case.
