3GB RAM, 16GB ROM and 128GB expendable. 5.5 inch full HD display. 13MP rear camera and 5MP front camera. 3300mAh battery. 2.5D Gorilla glass.
About Samsung Galaxy on8 I feel the phone is not so bad. The camera feature of the phone is quite good. The battery backup is also satisfied. The disadvantage of the phone is, it may get hang while running through many apps. Now according to the design of the phone, it is very attractive.
Overall its okay.