Apple's mobile phone can't accept SMS, and it is not authorized to open SMS. What happened?

No authorization. Apple's mobile phone can't accept short messages. Opening the short message shows that there is no authorization because there is no authorization. The way to open authorization is:

1. Under the owner user, open the "Settings" option on the Apple phone.

2. Secondly, enter the phone settings page and select the "Users and Accounts" option.

3. Then enter the user and account page and select the "multi-user" option.

4. Finally, enter the multi-user page and select User to open the authorization settings.