https://blog.wongcw.com/2019/09/11/%e6%b2%92%e6%9c%895g%e7%9a%84iphone-11-%e8%83%bd%e6%b2%bb%e5%a5%bd%e8%98%8b%e6%9e%9c%e7%9a%84%e5%bf%83%e7%97%85%e5%97%8e%ef%bc%9f/