How to turn off the ringtone of mobile phone

1, you can edit the short message "0000" and send it to "10086" and follow the short message prompts;

2. You can go to the business hall to cancel the business with valid certificates;

3. You can edit the short message "QX" to 12530 to cancel;

4. You can call 12530 and cancel according to the voice prompt;

5. You can log on to CRBT website to cancel.