Over all I will say that the SAM J3 is nice branded mobile under 10k amount.
According to my experience the following are the benefits of the mobile:
1) The 8 MP camera Quality is very good with the five inch amoled display the photos comes very colorful and bright.(i have given 2 clicks by samsung j3)
2) It is very slim and feels premium when carrying in hand. the look of the mobile with the upper black par is awesome.
3) The flash is superb and it helps me too much whenever I need.
4) The S bike mode works good.
5) The mobile does not heats up frequently.
6) It is also not too much costly comparing to other phones of Samsung.
7) Provides best quality sound in headphone including sound alive feature.
And the some demerits are:
1) It slows down sometimes due to the Jio network(as said in Samsung service center) otherwise it works well.
2) The sound quality is not good.
3) 2600 mah Battery is not sufficient for using the mobile for some long time.
Overall it is a pretty good mobile for using for long period because according to me is a hardy set.
Thank You