Pagebuddynotisvc is a service found on Samsung smartphones. A pagebuddynotisvc is Samsung’s headphone icon. When the headphones are plugged into the phone, the buttons which are displayed in the notification area are caused by that. It is an entirely harmless service but an increase in battery consumption can be due to pagebuddynotisvc. This service also provides error messages as soon as the headphones are connected to the smartphone.
You can disable it if you want to but it is better not to. Go to your phone’s Settings then More and tap on Application Manager. Now, select All to display all the Apps. Finally, select pagebuddynotisvc to disable it and restart your smartphone. If you are sure that you don’t need this service at all, you can permanently delete it too.