Hello frnds if u want to upgrade from mi note 3 to mi note 4 so plz dont doo becued is all most same have fauntion of mi note 3 just change in litel bet in body and processer means its have low processer then mi note 3 but its ok its worl asw but if u uses is huge like video eding or have game may see some lake on mi note 4
but who is buying 1st time mi note then u can buy mi note 4 becused its have nice look and prefomens and nice camera like mi note 3 but its has 13mp but its has improve the low light image its take well image in low light now compar to mi note 3 and ram also incrns 1st model like 3gb and 32 gb intrnl stroge also incrn in price of 9999 like mi note 3 in 9999 u get 2gb ram and stroge of 16gb intrnl