J7 prime is a decent phone with average feature. It is ppwered by exynos processor and has 3 gb of ram. The camera is nice. Although the speaker is not very loud and it wont be audible if u are not in the same room with your phone. The screen is sharp and Full HD. Yet is is not as vibrant as Super AMOLED screen which samsung puts in its every device. Even j7 2015 and j7 2016 is having one.
Its a good phone if gaming is not your first priority. It will lag a bit during heavy games like asphalt and NOVA 3.
Pros. J7 prime is having superb build quality. Its a unibody design with metal all around. I personally like the black color. The phones also has a slight curve on its screen which is called 2.5 d glass.
This phone although is a cheap phone but feels premium in hand.