I am using this phone from last 1 yr and what I experienced is they have some problems like lagging problem, phone dialer shut downs itselfs sometime, rear camera not up to the mark its average, performance is ok ok not very high.
Battery backup stands last not more than 4 to 5 hours while using continous browsing and playing videos, etc.This phone heats while playing high intensity games.so overall its a overpriced phone with less features.