You can select the ring tone you want to hear when you get a call.
Slide two fingers downwards starting from the top of the screen.
Press the settings icon.
Press Phone ringtone.
Press Add ringtone.
Slide your finger right starting from the left side of the screen.
Press Audio and go to the required folder.
Press the required ring tone to add it to the list of ting tones.
Press the required ring tone to select it.
Press the Home key to return to the home screen.