I have bought this product from offline retailer and used two to three days it worked very fine but as the days are gone the speed of my phone decreases and after a month it is swithing off automatically and the battery backup of this phone is also worst it work of 5 - 10 minutes and then swith off.
So to use this phone I have to put the phone in charging then use other wise it switch off other than this the camera is perfect and design and built quality is also well.