How to change CRBT by SMS in Qinzhou, Guangxi?

Only specific text messages (for example, after calling someone else's phone, there is a text message reply. Of course, you can go to 12530.com, then choose your favorite color ring back tone after the audition, and click Customize. Just send you a short message and enter the code. You can also call 12530, and he will remind you which songs are in your CRBT library. You can switch CRBT at will, or you can play multiple CRBT in turn (others have called many times and heard different CRBT). You can also ask that person to buy a color ring back tone, one by 2 yuan, to remind you that 12530 is charged and surfing the Internet is free.