I'm interested, so I'll post the current status on this matter. Regarding SMS authentication on the China dashboard, I (user) get a note on the dashboard as mentioned above, but I am able to use SMS authentication on the China dashboard using the Chinese phone number ( China Unicom) within China. As you all know, the input example is as follows. e.g.) Primary phone number +86xxxxxxxxxxx Of course, you can authenticate offline using an APP like Google authenticator or Authy. If you can't download Google authenticator from the store, you can substitute another similar APP. If you are concerned about the stable operation of SMS authentication, you can use it together with APP.
... View more
