How to update "Mobile data" state using a BroadcastReceiver

This BroadcastReceiver will trigger anytime "Mobile data" disconnects or connects.

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

this.registerReceiver(mDATAStateChangedReceiver,new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

}

@Override
public void onBackPressed() {
    
    unregisterReceiver(mDATAStateChangedReceiver); // this will unregister Receiver
    this.finish(); // this will finish ThisActivity
    super.onBackPressed();
}

private BroadcastReceiver mDATAStateChangedReceiver