https://qooah.com/2012/09/14/lg-optimus-g-%e6%9c%89%e6%a9%9f%e6%9c%83%e4%bb%8a%e5%80%8b%e6%9c%88%e5%85%a7%e5%9c%a8%e7%be%8e%e5%9c%8b%e5%9c%b0%e5%8d%80%e6%8e%a8%e5%87%ba/