open call list

link : http://loveyeri.tistory.com/entry/Android-Call-Log%ED%86%B5%ED%99%94%EB%AA%A9%EB%A1%9D-Activity-%EB%B6%88%EB%9F%AC%EC%98%A4%EA%B8%B0

Intent i = new Intent();
     i.setAction(Intent.ACTION_CALL_BUTTON);    
     startActivity(i);