The Samsung Galaxy A21s is a good Android phone with 2GHz Octa-Core processor that allows run games and heavy applications.
An advantage of the Samsung Galaxy A21s is the possibility of using two mobile carriers, a Dual-SIM device with two SIM card slots.
Good connectivity of this device includes Bluetooth 5.0 + A2DP/LE, WiFi 802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO, but it lacks NFC connection.