Dear friends I using mi redmi note4 gold color mobile last one month. This is 4 GB RAM ( Random Access memory) , 64GB ROM ( Read only Memory) , Expandable up to 128GB. This mobile is user friendly. Battery life is very good ( 4100 mAH) . Front camera is 5MP its compare to Samsung Galaxy J5, MI note 4 is good. Primary camera is 13MP. Overall satisfied with the product.