At a current price of about 89 Euros (~$106), it's almost impossible to find anything cheaper than the Redmi 9AT. However, Xiaomi cuts some corners in its entry-level phone in order to push the price below 100 Euros (~$119). Our review of the Redmi smartphone also reveals some unexpected differences compared with the Redmi 9A.
https://www.notebookcheck.net/Is-the-Xiaomi-Redmi-9AT-smartphone-a-sham.531921.0.html