What's small about that budget xiaomi?
It has a 5.1" screen and a ridiculous 22.5:9 aspect ratio.
If you do the math and include the bezels too, it's almost as tall as a modern flagship phone with 6" screen at 19:9, but ridiculously narrow.
That makes it easy to grip but impossible to use with one hand and horrible for media consumption.
And if you throw an imaginary hardware keyboard to that form factor, you end up with a device that's really uncomfortable to type too.

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