Phone ringtones

[Powdah]

I know how to change stock ringtones, but I do not see a way to make a song my ringtone. Is this possible

thks in advance

 

[B. Diddy]

Using a file manager app, copy the mp3 file to the directory called /Ringtones on Internal Storage (not the SD card). Now see if it shows up in the Ringtone selection list.