A unique ringtone for every single call? this is possible with the contact ringtone function of LG. a unique ringtone is composed and played based on the phone number. optionally, such a ringtone can be created for contact favorites, all contacts or for all calls.

Android 9 | LG UX 9.0
Ringtone ID -  Open the  Settings
Ringtone ID -  Tap on  Sound
Ringtone ID -  Enable or Disable  Ringtone ID
  1. Open the Settings
  2. Tap on Sound
  3. Enable or Disable Ringtone ID

LG Instructions