https://qooah.com/2013/01/11/%e9%9f%93%e5%9c%8b%e7%9a%84%e7%94%a8%e5%ae%b6%e6%9c%89%e5%b9%85%e4%ba%86%ef%bc%8clg-optimus-g-%e5%b7%b2%e7%8d%b2%e5%be%97%e5%8d%87%e4%b8%8a-android-4-1-jelly-bean/