I have been using this mobile from 4 months.i have no problems with this mobile. Its a package of 3gb ram and a camera of 13mp rear and 5mp front facing camera. The low light pictures are even awsome. The performance is superb. This has got a non removable battery which is troubling. Before a month I got a problem. I kept my phone in vibration mode and then I slept. Wen I got up and took my mbile into hand its vibrating. I m not getting any call or any message.but its vibrating .i dont know exactly how much time did it vibrate.but wen I switched it off. The problem got solved