What SMS does China Mobile send to download CRBT?

To change the color ring back tone by sending a short message, you need to know the number of the color ring back tone first. The inquiry method of CRBT number SMS is as follows:

Query the free CRBT command: edit MF and send it to 10658830.

Hot CRBT command: edit RM and send it to 10658830.

The latest CRBT instruction: edit ZX and send it to 10658830.

According to the content of SMS reply, select the color ring back tone number, edit "XZ+ color ring back tone number" and send it to 10658830 to replace the new color ring back tone.