https://blog.wongcw.com/2018/12/18/%e8%98%8b%e6%9e%9c%e7%99%bc%e5%b8%83ios-12-1-2%ef%bc%9a%e4%bf%ae%e5%be%a9esim-%e6%bf%80%e6%b4%bb%e5%95%8f%e9%a1%8c%e6%88%96%e8%88%87%e5%9c%8b%e5%85%a7%e7%a6%81%e5%94%ae%e6%9c%89%e9%97%9c/