I have been using this phone more than 1 years . It does not show any slow system or any technical problem .I bought it from amazon in sale and I have gold colour . It has 16 miga pixel at back side and 5 mega pixel at front .But now xiaomi gives 13 mega pixel at back side which is a draw back .The camera of this phone is better than redmi 3s \ prime, redmi note 4 . According to my opinion this phone is very light and had a sensor so you can control the tv or ac any thing which make this phone different from the other phone in the market .Other feature is the sound quality of the phone is awesome .This Phone Is Value for money.