iPhone OS 3.1 Direct Download Link

As always with every latest iPhone OS version there are new features and improvement. The latest version is 3.1 which come with iTunes 9. The latest version is available for iPhone 2G, 3G and 3GS.

There are many new and improved features in iPhone OS 3.1

iphone-os-3-1
Improved syncing for music, movies, TV shows, podcasts, and photos1
iTunes U content organization
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
Warn when visiting fraudulent websites in Safari (anti-phishing)
Improved Exchange calendar syncing and invitation handling
Fixes issue that cause some app icons to display incorrectly
Improved syncing for music, movies, TV shows, podcasts, and photos
iTunes U content organization
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