J2-6 is not a good phone as per my experiences.
I had used it for 2 months. At the beginning it is working better. But slowly as time passess it become a worst like a scary dream. Although it have 1.5GB of ram but on running 2-3 apps it starts like pausing the screan or app. It feels like aaaahhhh. Only I like it because of its samsung design. And body colour I had gold one. Its battery life is not good too. You have to plug charger very quickly on using it like playing games or straming video. In this phone I found much buffering on online video streaming even with good internet speed. Yeah most important some app takes too much time on opening it. I think its working is slow. May be it is some kind of defect in only the set I was using or may be general case of this model phone can’t be said.
But as per samsung it gives a good quality camera, the touch experiences.
So I will say you should well very much understand about this phone before to buy.