Read help info
You can select the ring tone you want to hear when you get a call.
Find "Phone ringtone"
Slide two fingers down the display starting from the top edge of your phone.
Press Phone ringtone.
Select your ring tone
Press the required ring tone to listen to them.
Once you've found a ring tone you like, press Done.
Return to the home screen
Press the home icon to return to the home screen.