https://qooah.com/2012/05/25/google-%e7%b9%bc%e6%94%b6%e8%b3%bc-motorola-%e5%be%8c%e5%86%8d%e6%94%b6%e8%b3%bc%e8%a8%ad%e8%a8%88-g1-%e7%9a%84%e5%85%ac%e5%8f%b8/