About two years ago, inexpensive phones landed in our reviews, some of which were already having trouble running their operating systems smoothly. Those times are definitely over now.
https://www.notebookcheck.net/ZTE-Blade-V2020-Smartphones-don-t-need-to-be-expensive-anymore.504062.0.html
Remember IPS + no notification LED light=useless phone for messaging and notifications since it can't make use of Always On Display like the way OLED can.