Samsung is very popular company, so I buy this product, but there are many problems first is its speaker very poor quality another its front camera its not much claer .and another one is if im inserted jio sim some of jio app like my jio app and jio tv are take a too much time to open in other phones it start quickly.and one other is some of app who preinstalled its take too much space in phone memory but other system like its apps & keypad & back camera its awesome but need to improve above feature to make phone hot seller