As I walk out of the house from my Wi-Fi hotspot into the cellular network on a call with my wife -- look at the upper left. That's the Wi-Fi signal.
当我从我家里的无线热点走出去的时候 然后走进蜂窝网络，这时候我在给我老婆打电话 注意看坐上角，现在显示的是无线信号