The setting is located under System Settings --> Display --> Notification light. You will find there the option to enable/disable the notification light for missed calls and voicemail, plus the ability to create/personalize new notification light alerts for your other apps.
The setting is located under System Settings --> Display --> Notification light. You will find there the option to enable/disable the notification light for missed calls and voicemail, plus the ability to create/personalize new notification light alerts for your other apps.