I bought Samsung Galaxy J7 - 6 last year for my father. The initial impressions of the phone were really good. The handset itself is very sturdy. The Sound reception and the call quality is good.
Now as the company promised that this phone was lag free and didnt hang, it didnt meet upto that. After about 2 months of use, the phone started to lag here and there. The multitasking between the apps became very sluggish .
The camera quality of the phone is average. It performs good in daylight but is not very efficient in low light conditions. The HDR mode or the night mode are not that effective. The images under the flashlight are not that good either.
Only good point was the design.The design of the handset is sleek and good. It feels good while holding in hand. Although the size is slightly broad and thus not easy to operate with one hand.
Its not that for the price of 15, 500/-. There are other options you might wanna consider.