I used this phone for last 1 year and now also it is runing very smoothly. Some time it hang after long use but it is good phone. But no upgrade version is avalible but the camera is quite well with 8MP/auto-focus and LED flash and front camera is also very good with 5MP. Display is very cool with 5 inches. and battery backup is not much good but it is avarage with 2100 mAh battery. Actually the look of the is very pretty and cool. over all this android smart is good.