Samsung Galaxy j2 is starting product of J series mobiles launched by Samsung initially only on online retailers.
The phone is one of best that came out of Samsungs stable in long time for this price range, but still there are far better options available from its Competitors.
The phone has a poor screen compared to other devices in the price bracket. It also doesn’t support USB otg which is a basic feature that phones even in lower price support.
I would highly recommend to steer away from this device and consider other alternatives.