The new features includes
1. Multitasking
Now you can run your favourite third-party apps — and switch between
them instantly — without slowing down the performance of the foreground
app or draining the battery unnecessarily.
* Only available to iPhone 4G & 3GS models
2. Folders
Organise apps into folders with drag-and-drop simplicity. Get faster
access to your favourites and browse and manage up to 2160 apps at once.
3. Even better mail
See messages from all your accounts in a unified inbox, organise
messages by threads, open attachments in third-party apps, and more.
4. iBooks
More than a great ebook reader, iBooks is also an amazing place to
browse and shop for books anytime, day or night.
5. Create playlists
Create custom playlists right on your iPhone.
6. 5x digital zoom
Get closer to your subjects by zooming in up to 5x.
7. Tap to focus video
While shooting video, tap the display to choose where to focus.
8. Faces and Places in Photos
View photos based on who’s in them and where they were taken
9. Home screen wallpaper
Change the background wallpaper on your Home screen.
10. Gift apps
Send apps as gifts to your friends or family.
11. Spell checking
A built-in spell checker works in Mail, Notes, and other apps.
12. Wireless keyboard support
Pair a keyboard based on Bluetooth wireless technology with your iPhone.