The United States launched the first mobile 5G, the netizen spit can not be used is what is going on?

The United States launched the first mobile 5G, the netizen spit can not be used is what is going on?: Overseas network December 19, the US News Agency said that US telecommunications operator AT&T announced that it will be the first to launch mobile 5G network services in 12 cities across the United States on December 21. As soon as the news came out, there were US netizens saying, I dare to say