This update contains new features and improvements, including the following:
Personal Hotspot for iPhone 4
Enable Personal Hotspot and share your iPhone 4 data connection with your Mac, PC, iPad, or other Wi-Fi-capable device. You can share your connection with up to five devices at once over Wi-Fi, Bluetooth, and USB — with up to three of those connections using Wi-Fi.
iTunes Home Sharing
Play music, movies and TV shows from a shared iTunes library on a Mac or PC (requires iTunes 10.2) on your iPhone, iPad, or iPod touch over a shared Wi-Fi network
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
This iOS 4.3 is compatible with iPhone 3GS, iPhone 4, iPad, iPad 2, iPod touch 3 and iPod touch 4.
This update is available via iTunes.