https://blog.wongcw.com/2019/01/19/%e4%b8%ad%e5%9c%8b%e7%a7%bb%e5%8b%95esim%e4%b8%80%e8%99%9f%e9%9b%99%e7%b5%82%e7%ab%af%e9%ab%94%e9%a9%97%e6%b4%bb%e5%8b%95%e5%95%9f%e5%8b%95%e6%94%af%e6%8c%81iphone%e5%8f%8aapple-watch/