Use APKPure App
Get DNS Changer PRO old version APK for Android
Change DNS in seconds and with 1 click
Works on 3G/4G/5G + Wifi
DNS Changer can change DNS for 3G, 4G, 5G connections in android versions 4.0 and above.
Cool thing:
It does not require root permission.
After changing Dns you don't need to open/close your net connection.