1. Find "‹SIM› ringtone"
Press Settings.
Press Sounds.
Press ‹SIM› ringtone.
2. Select ring tone
Press Music on device.
Press the required ring tones to hear them.
Once you've found a ring tone you like, press arrow left.
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.