Following are new added features in OS 3.1 or advantages of OS 3.1

• iTunes U content organization1
• Improved performance of iPhone 3G Wi-Fi via Bluetooth
• Now iPhone users can paste contact numbers into keypad
• Improved control over voice with Bluetooth headsets on iPhone 3GS
• Now iPhone users can watch new credits in App store and iTunes store
• New feature of warning on visiting fake websites in Safari (anti-phishing)
• Now iPhone users can easily save video from mail and MMS into camera roll
• Invitation handling and Exchange calendar syncing is improved in OS 3.1
• New feature is added of locking iPhone with the help of passcode via MobileMe
• Easy exchange of codes, iTunes Gift Cards as well as certificates in the App Store
• Now iPhone programmers can easily solve issues regarding incorrect display of apps icons
• New option is added of using “Home button” to activate accessibility features on iPhone 3GS
• Now iPhone developers can provide improved syncing for entertainment with TV shows, movies, music, photos1 and podcasts
• Another new option is added of "Save as new clip", the new video can be saved easily as new clip on iPhone3GS at the time of video trimming.

To adding up the new facilities in existing iPhone applications/softwares by utilizing new versions of iPhone SDK 3.1 and OS3.1 needs professional iPhone developers. iPhone Application Development India provides expert iPhone programmers to integrate new features offered by iPhone OS3.1 in the existing iPhone applications with the help of SDK3.1.