https://qooah.com/2011/07/12/lg-%e5%8f%88%e4%be%86%e6%89%bf%e8%ab%be-optimus-2x-%e5%8f%8a-black-%e9%83%bd%e5%8f%af%e5%8d%87%e7%b4%9a%e5%88%b0-android-2-3-4/