Send a text message to the mobile phone safe to 12 1 14?

Well, this is indeed a confirmation of identity. It's okay. If you only rely on your mobile phone number, the server can't be sure that the user is you, so you need to use your mobile phone number to get the password, which is also for the security of your address book. I have used this software, which is quite easy to use and convenient for one-click backup.