I bought this TV for my dad. I chose it, because of Android and the Xiaomi brand (cheap and decent).
But how surprised I was at how bad it is ... and built-in picture modes can't fix it. The contrast is very high, because of which the bright areas are highlighted, and the shadows fall into blackness. The white balance is terribly blue, and the colors are off and very far from correct. Viewing angles are terrible, with minimal horizontal deviations resulting in severe color fading and contrast degradation.
Built-in profiles do not improve the situation. Even the 'cinema' profile, although slightly improving the picture, is also very bad, reddish and blueish at the same time.
I did not return the TV, because the picture is not very important to my dad.
Nevertheless, I tried to calibrate by screencasting my phone to TV and looking at the same photos/videos. I have op8pro and Samsung s21 with nature profiles activated. These are the top displays for today.
I do not guarantee that my settings will suit everyone, as there are different assemblies and different batches of displays for this TV. I have 55' and Poland assembly.
But give it a try.
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About my edits: I edited "Vivid" profile. All my edits you can see in this video. I set the backlight to 100 because it's better for dad. But you can adjust it to your liking. I didn’t turn off auto-brightness, because although it works not so well, it still helps because you don’t have to constantly go into the settings and adjust it for day or night. Also, you can adjust sharpness to your preference.
At first, the picture may seem too warm, but this is normal. It takes time until the eye adapts after a transition from the blueish standard profile :)
Keep in mind that video camera don't show real-life colors. Its not so greenish in real life, like in this video.
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If we talk about the result, it is still not as good as on my phones. But this is the maximum that I could pull out.

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