It is a good product and it has been working very fast.and it a smooth touch and is mobile is super working.it has 4GB ram and 64GB internal memory it has expansion upto 128GB memory.it has 13 mega pixel camara and 8 mega pixel front camara.and 4000mah battery and one future is there in setting. One option is second space is very nice option.in redmi note 4 is Good working