They are not the same. In addition to sticking film on the phone screen, it can be pasted on the phone body, but DC film sticking is impossible.
There is no difference. They all stick film on the LCD screen. The result is that film is pasted on the screen.
The benefits of mobile phone film sticking: It is scratch resistant, fingerprint resistant and dust resistant. Nowadays, all phones are advised to stick a protection film. If you don't stick a film, the screen is easy to be scratched.
