Useful, even more important than tempered film. After all, most mobile phone cases can protect five of the six sides of the phone. Whether it is scratches or knock marks, they can be effectively avoided. Now 2.5D glass Rampant, most of the toughened film is not easy to stick, so it is understandable if you don't stick the film, but if you can't guarantee that you won't fall once in a few years, then just take a shell. Feel at home, just throw it on the bed and feel it casually, it’s better to go on the street