https://blog.wongcw.com/2021/06/24/vivo-v21e-5g%e6%96%b0%e6%a9%9f%e8%a6%8f%e6%a0%bc%e6%9b%9d%e5%85%89%ef%bc%9a%e5%a4%a9%e7%92%a3700%e8%8a%af%e7%89%87%e7%b5%84%e5%94%ae%e5%83%b9%e4%bd%8e%e6%96%bcv21-5g/