I bought J5 20 days before ; in the day light rear camera shot nice quality pics but in the night , even if you use flash light , the rear camera gives a very dull quality pics like a 1.2 mp camera.
I was so surprised is it a s/w issue or h/w limitation . I took a pic in night with a samsung dual core, which has a 5 mp camera, and its quality was better than J5 13 mp camera in in night time.
Also the ring tone is very very slow.