I am using this phone from one year. I never detected any problem in this phone. mi company has establish faith in indian by launching this type of phone. now almost everyone has mi company’s phone. because of good performance of their phone. its software is also very good. new updates of software are being launched day by day. but there is a draw back of this phone is that you cannot extend its memory. you cannot insert memory card in it. but this phone is available in 16gb/32gb storage. so this is not a big deal.