I am using samsung galaxy J7 currently and I will tell u about its performance.first of all its screen size is 5.5 inch and its resolution is not that much good, you can’t experience full HD videos in this.
Camera is 13 mp and clarity is also fantastic and when you will zoom the pictures pixels will not get burst like other phones do.but I am facing problem in my camera now a days when I open my camera it opens blur and after 10-20 seconds it gets clear.
Sound quality is great and very clear but not very high.it is very slim phone and easy to operate.look wise also nice. Touch of this phone is very smooth. This phone is OTG supported you can put pendrive in it and can enjoy movies and songs.