How to cancel the cool dog CRBT on Apple mobile phone

1. Open the cool dog ringtone app in your mobile phone, go to the home page and click the search icon in the upper right corner.

2. After opening the cool dog ringtone search interface, enter the ringtone name in the search box, and then click the "Search" button on the right.

3. After searching for the ringtone you want, click the icon behind the corresponding ringtone "...".

4. Open the ringtone setting list and click the "Set ringtone" option.

5. Click the lock button behind "Allow system settings to be modified" to open this permission.

6. Open the "Set Ringtone" dialog box of Cool Dog Ringtone again, and click "Call Ringtone" to set the ringtone.