Thei are very few mobiles like mi4i . theis small has many good feature what samsung and sony gives beyond 20k .
An important thing is it never lags . it has a good battery backup that gives u ajuice of aound 1 -2 days .
Sound an speakers are really good
Miui camera is best of all, nothing better than this
Miui is bringing android M( marshamallow) for all it s devices this month