Where are the homemade ringtones, notification ringtones and alarm bells in the mobile phone? How to delete

Does the ringtone file referred to by LZ refer to the built-in system? If so, deleting the ringtone file built into the Android phone requires the phone to obtain ROOT permission and be supported by RE Manager.

Use RE to open the system path, as shown below:

System → media → audio → alarm clock (alarm clock), notification (short message) and ringtone (incoming call).

In addition: If you need to delete the ringtone file built into the system, please set the ringtone to another ringtone file before deleting it. After deleting the ringtone file with RE, you need to restart the phone before the system can work normally.