Compressed by what? Are you just talking about videos you record on your phone?
I do not know what phone you have but an iPhone 12 ( as an example ) is under 1300 pixels on the short dimension. So you are not getting much more than 1080 pixels no matter what. It seems any experiential difference would have more to do with compression quality than with resolution.
Speaking for myself, I do not think I could tell the difference between 4K and 1080p on a phone ( on a decent AV1 clip ).
I do not know what phone you have but an iPhone 12 ( as an example ) is under 1300 pixels on the short dimension. So you are not getting much more than 1080 pixels no matter what. It seems any experiential difference would have more to do with compression quality than with resolution.
Speaking for myself, I do not think I could tell the difference between 4K and 1080p on a phone ( on a decent AV1 clip ).