Apple's mobile operating system keeps getting better. The iOS 4.3 is currently available for download adding new features that let users do even more with their iPhone, iPad, and iPod touch.

New features in iOS 4.3 mobile operating system include faster Safari mobile browsing performance; iTunes Home Sharing; enhancements to AirPlay; the choice to use the iPad side switch to either lock the screen rotation or mute audio; and Personal Hotspot to share an iPhone 4 cellular data connection over Wi-Fi. Additional iPad 2 features include a built-in gyro for gaming; HSUPA support for enhanced 3G upload speeds on iPad 2 Wi-Fi + 3G on AT&T, and HDMI Video Mirroring that lets users mirror their iPad screen on an HDTV using an optional adaptor.

Here are the basic features of the new iOS 4.3 mobile operating system:

The Nitro JavaScript engine that Apple pioneered on the desktop is now built into WebKit, the technology at the heart of Safari, and more than doubles the performance of JavaScript execution using just-in-time compilation.

New iTunes Home Sharing allows iOS 4.3 users to play music, movies and TV shows on an iPad, iPhone or iPod touch from their iTunes library on a Mac or PC over a local Wi-Fi network. With Home Sharing on your iPad, iPhone or iPod touch you've got your entire iTunes library in your hands wherever you are in your home.

iOS 4.3 includes enhancements to AirPlay, the wireless technology that allows users to stream music, photos and video to Apple TV. With iOS 4.3 you can stream additional content including video from third party apps and web sites, videos from the Photos app and previews from the iTunes app to your TV. AirPlay also allows you to bring photos to life on the TV screen by using one of the new slideshow transitions, or shoot a video on your iPad 2, iPhone or iPod touch and stream it directly from the Photos app to Apple TV.

The new Personal Hotspot feature in iOS 4.3 lets you bring Wi-Fi with you anywhere you go, by allowing you to share an iPhone 4 cellular data connection with up to five devices in a combination of up to three Wi-Fi, three Bluetooth and one USB device. Joining a Personal Hotspot is easy and once the feature is enabled a status bar displays how many devices are currently connected. Every connection is password protected and when not in use Personal Hotspot turns itself off to save battery life.

iOS 4.3 is compatible with iPad, iPad 2, iPhone 3GS, iPhone 4 (GSM model), plus third and fourth generation iPod touch.