Now the TV is wired through the set-top box by default, so you can watch TV. But if you want to project the screen, you must connect the TV's WiFi. This way, the mobile phone and the TV can be projected under the same WiFi.
If you want to show a movie, you can directly use the one-click screen projection on the APP. If you want to screen the whole interface of your mobile phone, you need to download your TV-related screen projection software. Maybe your TV doesn't support the screen projection function, or your mobile phone is not set correctly. As long as TV supports screen-projecting mobile phone software, screen-projecting mobile phone and TV, the same WiFi must be put on TV.
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