安卓系统已支持禁用 2G 网络，以防止伪基站攻击 https://www.ithome.com/0/598/587.htm
Why is this step necessary? hello.2heng.xin might not be the server where you are registered, so we need to redirect you to your home server first. Don't have an account? You can sign up here
hello.2heng.xin
