Received a text message from 189. Can anyone else open it?

If your mobile phone is turned on, and you have bound the 189 mailbox, others can open it when they get your mobile phone, which is equivalent to opening it yourself. If your mobile phone is locked, others can't open it. First, you need a password or fingerprint verification to open the phone, otherwise you can't open it. Also, if you don't bind your mobile phone to your mailbox, even if others open your mobile phone, you can't log in to your mailbox. Similarly, they don't have your account number and login password.