Nokia Lumia 710

Find "ringtones+sounds"

Press arrow right to access the main menu.

Find "ringtones+sounds"

Press Settings.

Find "ringtones+sounds"

Press ringtones+sounds.

Select your ring tone

Press the field below Ringtone.

Select your ring tone

Press the playback icon next to the different ring tones to hear them.

Select your ring tone

Once you've found a ring tone you like, press the required ring tone.

Exit

Press the Home key to return to standby mode.