Samsung Galaxy S6 Edge: How to Add a Contact to Favorites in Android 5.1.1 Lollipop

You'll have some advantages when you add your frequently contacted or important contacts to favorites in your Samsung Galaxy S6 Edge, such as: you can easily call your favorite contacts simply by single tapping the contact icon in the favorites list, you can set calls/messages from your favorite contacts as exceptions when the do not disturb mode is on, your favorite contacts will be displayed at