Ringtone ID automatically composes a ringtone by the telephone number, so that you can recognize the caller just with the sound. The ringtone is automatically composed in real time through 'harmony and chord running' algorithm using the caller's phone number.
From the Home screen, tap Apps > Settings > Sound tab > Ringtone ID
Tap the switch on
Tap Compose ringtones for and select from Everyone, Contacts, or Favorites. Ringtones will be composed automatically from their phone number.
Note: For numbers with no Ringtone ID, current ringtone in use will sound.