Features of Iphone 4:
1>Dual camera on front and back of the phone.
2>Introducing “Video Calling”.
3>Highest Resolution display ever on a phone. 364 Pixels per inch,you get 4 times the pixels as before. This is achieved by “Optical Lamination”.
4>Enables “Multi Tasking”. You can easily and quickly switch between applications.
5>Ability to create Folders. This feature is also upgraded in iphone 3GS recently.
6>Multiple thread emails are categorised under single email.
7>Camera -5 MP to capture images. Camera is also facilitated to capture 720P High Definition video. You can also edit your video.
8>Built in A4 chip which facilitates remarkable speed and efficiency!
9>Battery size is increased which delivers 40% more talktime.
Check this video!