I am existing user of this iphone.Its really a good product since I am using.Pucture quality is awesome.Quality of sound is superb.The capacity of battery is also good.Now it has become most wanted due to its good features.There is no any disadvantage since I am using.Internal capacity is so marvellous.At last I would say one thing it will be very demanded upto next century because everyine wants a good features and all things are available in it.