I use this phone araund 1 year .this smarphone suport 4G but only in 1st slot, its 2nd slot is 2G. Thair battery is 4000 mh this is very good . but thair performace is bad, so much heeting problem , its back camera 8mp , and front 5mp . its camera in indoor place is very bad , and in outdoor its average. Its sound quality is averege. Overall this smartphone in this price range is very bad. Its gaming performace very bad. So as your choise buy thise phone or not. Thank you