https://blog.wongcw.com/2019/10/31/%e6%b6%88%e6%81%af%e4%ba%ba%e5%a3%ab%ef%bc%9a%e8%98%8b%e6%9e%9c%e6%94%af%e6%8c%815g%e7%9a%84iphone-12%e5%b0%87%e6%9c%89%e5%8a%a9%e6%96%bc%e5%88%ba%e6%bf%80%e6%98%8e%e5%b9%b4iphone%e9%8a%b7%e9%87%8f/