https://qooah.com/2011/06/22/android-%e6%94%bb%e9%9f%93%e5%a0%b1%e6%8d%b7-%e5%bc%b7%e6%94%bb7%e6%88%90%e4%bd%94%e6%9c%89%e7%8e%87-samsung-%e6%98%af%e5%8a%9f%e8%87%a3/