How to activate the CRBT function?

The opening method is as follows: 1) Before opening, you can call 10000 to provide relevant certificate information; 2) Hello, Tianyi mobile phone, fixed-line users can bring relevant certificates to the business hall to open the color ring back tone function; 3) Tianyi mobile phone, Hello Yitong, fixed-line users can dial 1 18 100 to open the color ring back tone function; (Call 1 18 100 to charge the normal communication fee) 4) Tianyi mobile phone and Hello-Tone users can edit the short message KT and send it to1100 to open the color ring back tone function; (Send a short message to 1 18 100 to charge the normal short message fee) 5) Tianyi mobile phone and easy-to-connect users log in to the CRBT website and click "Enable CRBT" to enable the CRBT function. For more service offers, click on "official website" Customer Service 2 19 below to answer your questions.