Redmi note 4 is similar to redmi 3 in many ways. The processor of mi 4 is 2Gh . Also this phone has 32 gb internal memory. This looking of phone is awesome. Also the display size is similar as of mi 3 that is 5.5 inch display. Also the battery is similar like mi3 i.e 4100 mAh. The range is also similar of both the phones. So I am telling you to buy redmi note 4 instead of mi 3 , as the cost is same also the functions are also same. It has latest version that is MIUI8 is present in mi4