Does it cost money to set the color ring back tone to cool tone?

Some are free, and some ring tones need to be charged. The setting method is as follows:

1. First, after turning on the cool sound in the mobile phone, click the music list option at the bottom, as shown.

2. Then in the music list, you can listen to music first, and click on the music you like, as shown in the figure.

3. After opening the music details interface, click the ringtone setting option at the bottom of the cover, as shown.

4. A window will pop up at the bottom. Select the set ringtone and click it, as shown in the figure below.