The camera quality is awesome with such a device with this price range, 3s prime has a hybrid sim slot that means two sim slot. one is prominent sim slot is a dual sim sensors on the phone include compuss magnetometer, proximity senser and gyroscope. finger print senser very and accurate.love to use it. the senser several time step by stap and its bang on good desing easy to operate with one hand impressive battery life qyick fingerprinter recognition.