Unable to make call from my real device

public class MainActivity extends AppCompatActivity {

    public static final int PICK_CONTACT_REQUEST = 1;
    TextView contactNumber;

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

        contactNumber = (TextView) findViewById(R.id.contactnumber);
        Button buttonPickContact = (Button) findViewById(R.id.pickcontact);

        buttonPickContact.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                pickContact();
            }
        });
    }


    private void pickContact() {

        Intent pickContactIntent = new Intent(Intent.ACTION_PICK, Uri.parse("content://contacts"));
        pickContactIntent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE);
        startActivityForResult(pickContactIntent, PICK_CONTACT_REQUEST);

    }


    //==========================================================================================

    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {

        if (requestCode == PICK_CONTACT_REQUEST) {

            if (resultCode == RESULT_OK) {

                Uri contactUri = data.getData();

                String[] projection = {ContactsContract.CommonDataKinds.Phone.NUMBER};

                Cursor cursor = getContentResolver()
                        .query(contactUri, projection, null, null, null);
                cursor.moveToFirst();

                int column = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
                String number = cursor.getString(column);

               //HERE IS THE PROBLEM,WHEN I HIT A NUMBER IT RETURNS TO THE STARTING SCREEN
              //I TRY TO DO WITH INTENTS

              Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse(number));
              
             
             if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) !=                          PackageManager.PERMISSION_GRANTED) {
    // TODO: Consider calling
    //    ActivityCompat#requestPermissions
    // here to request the missing permissions, and then overriding
    //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
    //                                          int[] grantResults)
    // to handle the case where the user grants the permission. See the documentation
    // for ActivityCompat#requestPermissions for more details.
    
}
startActivity(intent);
            }
        }
    }

   
   
}