You can select the ringtone you want to hear when you get a call.
Find "Phone ringtone"
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap Phone ringtone.
Tap the required category.
Tap the different ringtones to hear them.
Once you've found a ringtone you like, tap Save.
Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.