The highlights of the new firmware include:
Genius Recommendations for Apps - Get recommendations for apps you might like based on apps you've already downloaded.
Genius Mixes - Have iTunes automatically create mixes based on what's already in your library. You don't even have to choose a sample song.1
Download Ringtones Wirelessly - Choose from thousands of iPhone ringtones on the iTunes Store and buy them with a tap.
Organize Apps in iTunes - Use iTunes on your computer to drag apps onto virtual Home screens, then sync them to your iPhone.


Improved syncing for music, movies, TV shows, podcasts, and photos1
iTunes U content organization1
Redeem iTunes Gift Cards, codes, and certificates in the App Store
Display available iTunes account credits in the App Store and iTunes Store
Save video from Mail and MMS into Camera Roll
Option to ?Save as new clip? when trimming a video on iPhone 3GS
Better iPhone 3G Wi-Fi performance when Bluetooth is turned on
Remotely lock iPhone with a passcode via MobileMe
Use Voice Control on iPhone 3GS with Bluetooth headsets
Paste phone numbers into the keypad
Option to use Home button to turn on accessibility features on iPhone 3GS

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