What's the best thing about CRBT plus SMS processing?

"CRBT++" is a new function of CRBT service, that is, playing CRBT ++ ringtone before calling customers hear the original CRBT tone. Customers can edit and set CRBT ++ ringtones in many ways, such as personalized music, sound effects, voice clips and so on. (This service is only available to CRBT customers for the time being)