Samsung galaxy s duos 2 is budget 3G smart phone. Phone is very good and its screen is average. The battery last for almost a day. The phone is 3G and speed is very good. Wifi speed is also good. The phone call is very good and clear. Camera is bad for this phone . Front and back camera is not good. Phone is very thick. The phone performance is average. Phone is very average in everything because it is a budget smartphone.