Some of the new features in the 4.0 iPhone OS are:
- Multitasking (Double-Tap home button, you can run up to 4 apps simultaneously)
- BlueTooth Keyboard
- 5X Digital Zoom
- Change Homescreen wallpaper
- SMS Reminders
- Sync IMAP Notes
- Tap-to-Focus Video
- Web Search Suggestions
- Find & Delete Mail Search
- Larger Fonts for Mail
- Wake on Wireless
- Changeable image size in mail messages
- Background Audio
- VoIP (AT&T is going to hate Skype)
- Background location
- Local Notifications
- Faster App Switching
- Folders*
- Enhanced Mail Application
- Can have 2,160 apps installed instead of 180
- iBooks for the iPhone (With Free Winnie The Pooh)
- In-App encryption
- Game Centre
- MultiPlayer Matchmaking & Invite Friends Option
- iAd
- HTML5
Incompatible with 1st gen iDevices, 2nd gen will have limited features.
Woah, they even changed some of the icons for the default apps.
Pandora radio is now fully background-aware so you can exit the app and still listen to music!
Multitask with 4 different apps at once! Amazing
Skype behaves just like your standard calling in the new OS! Same style notifications too (Note: You can also receive skype calls when your phone is locked) You can also exit the app and run another one, just like standard calling.
The enhanced mail application has a unified inbox & better searching
*Folders is just like categories for those of you that have jailbroken your iPhone/iPod Touch
NOTE: iPod Touch users still have to pay, free for iPhone users
