https://qooah.com/2011/01/25/lg-optimus-2x-%e9%9f%93%e5%9c%8b%e5%b7%b2%e9%96%8b%e8%b3%a3-%e7%99%bd%e8%89%b2%e7%89%88%e4%ba%ae%e7%9b%b8/