Samsung likes to try new things with the J-series, like the Galaxy J3 (2016) with S Bike mode. The still-unofficial Samsung Galaxy J2 (2016) will have a Smart Glow feature, which redesigns the notification LED. Artist's impression of the Smart Glow ring A leaked manual shows Smart Glow is a ring around the camera on the back of the J2. The ring can light up in different colors, which are user configurable - a different color for different apps. You can also set Usage alerts. They track battery, data and storage and can change the color of the Smart Glow ring after these pass a...
Source: http://www.gsmarena.com/galaxy_j2_2016_may_replace_notification_light_with_smart_glow_ring-news-18863.php