Xiaomi makes excellent value smartphones and now represents a major player in the smartphone market, most notably in China.
An example is the Xiaomi Mi 11, which is one of the best phones you can buy for its moderate price tag of $650 USD. Another example is the cheaper Mi 11 Lite, which comes in a range of fun colours and only costs $300.
I myself don’t use a Xiaomi phone, I prefer the security and convenience of iPhone as opposed to the power and customisability of Android. However, it’s still an excellent choice if you want a good smartphone that doesn’t cost the Earth.