https://blog.wongcw.com/2018/12/13/iphone-xr%e7%88%86%e5%86%b7iphone%e4%bd%8e%e9%85%8d%e6%a9%9f%e7%82%ba%e4%bd%95%e8%b3%a3%e4%b8%8d%e5%8b%95/