https://qooah.com/2012/09/01/%e9%9f%93%e5%9c%8b-lg-optimus-2x-%e5%8f%af%e7%8d%b2%e5%8d%87%e4%b8%8a-android-4-0-ics-%e7%b3%bb%e7%b5%b1/