My friend bought this phone during 2015. It has internal storage of 16GB. At initial stage it works really good. After some month it starts to hang due to more apps which also drains the battery. But compare all other mobiles samsung galaxy j7 has more battery life.
Rear and front camera view pixel is 13.
But the picture quality is not so good. The resolution is about 5.5, the screen is wider so it helps to read clearly.