Xiaomi’s new flagship phone the Mi9 will be released in China and then globally. However their presence in North America is still not strong, so the question is will the Mi9 work in America?
The answer to that is maybe and probably. You have to check with your provider and see what bands they run on. Most likely it will work on most services on 3G but who wants 3G only? You need to check to see the 4G and soon enough 5G bands that your provider like T-mobile, AT&T, etc have and then make your decision from there.
This article will be updated once the official specs are released.