* Personal Hotspot
- Share iPhone 4 cellular data with up to 5 devices (combination of up to 3 Wi-Fi, 3 Bluetooth, and 1 USB)

* iTunes Home Sharing
- Play music, movies, and TV shows from a shared iTunes library on a Mac or PC (requires iTunes 10.2)

* New AirPlay features
- Play videos from the Photos app including the Camera Roll album, iTunes previews, enabled third-party apps and websites on Apple TV
- Play slideshows from Photos on Apple TV using transitions available on Apple TV

* Faster Safari performance with Apple Nitro JavaScript engine

* HD video out using the Apple Digital AV Adapter
- View 720p HD videos from Videos app, iPod app, Photos, YouTube, Safari, Keynote, and enabled third-party apps on an HDMI display

* Ping features
- Push notifications for comments and follow requests
- Post and Like songs directly from the Now Playing screen
- Parental controls

* New Settings
- Messages setting for number of times to repeat an alert
- iPad side switch setting to lock screen rotation or mute audio notifications and sound effects

* Single tap conference call dialing with a pause to send a passcode

* Bug fixes