iOS 4.3 Software Update

Updating is easy.

Just connect your device to your Mac or PC and follow the onscreen instructions in iTunes.

The world’s most advanced mobile operating system keeps getting better. Download the free iOS 4.3 Software Update and get new features that let you do even more with your iPhone, iPad, and iPod touch. The software update is free. It’s easy. And you can download it right now.

Safari Performance

Surf at the speed of fast.

As you surf the web, your fingers will love the responsiveness of the new Nitro JavaScript engine powering Safari. It runs JavaScript up to twice as fast as in iOS 4.2.2 Which means you get more speed behind each page load. And sites with lots of interactive features can appear on your screen even faster.

iTunes Home Sharing

Share over the air.

Now you can play your entire iTunes library from anywhere in the house. If it’s on your Mac or PC, you can play it on your iPhone, iPad, or iPod touch over a shared Wi-Fi network.3 And not just music. Watch a movie or TV show. Play a podcast. Or listen to an audiobook. On whichever device you want — without having to download or sync.

iPad Side Switch

Switch it up.

Customize the switch on the side of your iPad to lock the screen rotation or mute the volume. So you can lock your iPad display in landscape or portrait. Or quickly go from volume on to volume off. Just configure the side switch in Settings to toggle between your options.

Silent or screen rotation lock

Personal Hotspot for iPhone 4

Get online in more places.

On the road, in an airport, at the park — now you can bring Wi-Fi with you wherever you go. Download iOS 4.3 on your iPhone 4, and the next time you find yourself without access to Wi-Fi but in 3G territory, enable Personal Hotspot and share your cellular 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.4 Every connection is password protected and secure. And it’s power friendly, too. iPhone detects when your Personal Hotspot is no longer in use and turns it off to save battery life.

iOS 4.3 also includes these great features from previous releases:


Run all your favorite apps — and switch between them instantly — without slowing down the performance of the foreground app or draining the battery unnecessarily.5


Organize apps into folders with drag-and-drop simplicity. Get faster access to your favorites and browse and manage thousands of apps.


Print mail, photos, web pages, and more directly from your iPhone, iPad, or iPod touch to an AirPrint-enabled printer.6


Wirelessly stream music, photos, and video to your Apple TV and AirPlay-enabled speakers or receivers.1

Find My iPhone, iPad, or iPod touch

Locate your missing iPhone, iPad, or iPod touch on a map, remotely set a passcode lock, display a message, and more free with iOS 4.2 or later.7

Game Center

Experience social gaming on your iPhone, iPad, or iPod touch. Find friends, track achievements, and compare high scores.8

iTunes TV show rentals

Rent your favorite TV shows commercial free and in HD from iTunes. Just 99¢ per episode.

Even better Mail

See messages from all your accounts in a unified inbox, organize messages by threads, and open attachments in third-party apps.

iOS 4.3 is compatible with these devices:

  • iPhone 3GS
  • iPhone 4 GSM Model

Learn more about iPhone

  • iPod touch 3rd generation
  • iPod touch 4th generation

Learn more about iPod touch

  • iPad
  • iPad 2

Learn more about iPad

  1. AirPlay is compatible only with the second-generation Apple TV.
  2. Testing conducted by Apple in February 2011 using SunSpider JavaScript benchmark version 0.9.1 with prerelease software and shipping hardware. Actual results may vary.
  3. Requires iTunes 10.2.
  4. Personal Hotspot requires a supporting hotspot tethering plan from your carrier and works with up to three devices over Wi-Fi, three devices over Bluetooth, and one device over USB.
  5. Multitasking is available with apps that have been developed to work with iOS 4.
  6. Requires an AirPrint-enabled printer. See for a list of compatible printers.
  7. Once you create a free Find My iPhone account on your iPhone 4, iPad, or iPod touch (4th generation), you can use your Apple ID and password to enable the same features on your other devices running iOS 4.2 or later.
  8. Game Center works with apps that have been developed to work with the Game Center service.