How do Unicom users set up CRBT through SMS?

Unicom does not have CRBT service, so it cannot set CRBT. Unicom provides a service similar to CRBT, that is, CRBT service. If the ringtone is set, Unicom users who have started the ringtone service can access Unicom Wo Music official website through the computer, click Login in the upper right corner of the page, enter the mobile phone number (email and other user names), password and verification code, click the account at the portrait in the upper right corner of the page after successful login, then enter the user center > business management interface, and select the ringtone to be set in the "ringtone library" or "ringtone box".