https://qooah.com/2012/02/22/%e6%90%b6%e5%85%88%e5%81%b7%e7%9c%8b%e6%ad%a3%e5%bc%8f%e7%89%88-cyanogenmod-9-%e9%96%8b%e6%a9%9f%e5%8b%95%e7%95%ab/