The iPhone has been updated to OS 3.1 and is available for download featuring Genius recommendations for apps and on-device Genius mixes. The new iPhone OS 3.1 allows you to download ringtones wirelessly, Save video from mail and MMS into Camera Roll, remotely lock iPhone with a passcode via MobileMe and organize apps in iTunes (similar to 3rd party app ‘Movement’).

Full Feature List of iPhone OS 3.1.
1. Genius Recommendations for Apps - Get recommendations for apps you might like based on apps you’ve already downloaded.
2. Genius Mixes - Have iTunes create up to 12 playlists based on what’s already in your library. You don’t even have to choose a sample song.
3. Download Ringtones Wirelessly – You can now easily make a choice from thousands of iPhone ringtones on the iTunes Store and buy them with a tap.
4. Organize Apps in iTunes- Use iTunes on your computer to drag apps onto virtual Home screens, then sync them to your iPhone
5. Improved syncing for music, movies, TV shows, podcasts, and photos
6. iTunes U content organization
7. Redeem iTunes Gift Cards, codes, and certificates in the App Store
8. Display available iTunes account credits in the App Store and iTunes Store
9. Save video from Mail and MMS into Camera Roll
10. Option to “Save as new clip” when trimming a video on iPhone 3GS
11. Better iPhone 3G Wi-Fi performance when Bluetooth is turned on
12. Remotely lock iPhone with a passcode via MobileMe
13. Use Voice Control on iPhone 3GS with Bluetooth headsets
14. Paste phone numbers into the keypad
15. Option to use Home button to turn on accessibility features on iPhone 3GS
16. Warn when visiting fraudulent websites in Safari (anti-phishing)
17. Improved Exchange calendar syncing and invitation handling
18. Fixes issue that cause some app icons to display incorrectly
Click here to get full instructions from Apple.
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