Samsung grand quattro is not a good phone because it has many issues with it its battery backup os also not good it is about 2000 mah it doesn't have good camera clearity its rear camera is 8 mp.
And front camera is also not good its style also not enough good but it average when I installed some app it start to hang I cant fill many to this phone and its android is only 4.2 jellybean overall it is a bad phone