https://blog.wongcw.com/2018/10/14/%e8%b6%8585%e4%b8%87%e4%ba%ba%e9%a2%84%e7%ba%a6-iphone-xr%e5%8d%b3%e5%b0%86%e5%8f%91%e5%94%ae%ef%bc%9a6499%e5%85%83%e8%b5%b7/