I am using this phone since one year. It is really good smart phone and specially for those guys who are looking for Camera quality, Performance, Screen size, RAM and no heating problem. Sound is good and video quality is excellent! And the phone is very easy to use and for professional guys than it is very use full phone.
Battery backup is 5/10, Video quality is 9/10, Sound is 8/10, Performance 9/10.
Disadvantage of this phone is Batter backup.