According to gsmarena.com Samsung Galaxy J7 - 6 is a 6th price group(6/10) phone So it is middle range phone.
The main speciality of this phone is it’s camera because this phone comes with 13 MP camera’ f/1.9, 28 mm’ lens and sensors, so the this phone produces the excellent images than other phone in this price group.
The Samsung build this phone with 3300 mAh, Li-ion battery, it provides more than 1 day battery life and’7-9 hours screen on time’