After a long delay to fix bug, Apple has finally released the latest version of its mobile operating system iOS 4.2.1 for iPad, iPhone and iPod touch. The iOS 4.2.1 has been incorporated with lots of new features, including Multitasking, Folders, Unified Inbox, Game Center, AirPlay, AirPrint and Find My iPhone (or iPad or iPod touch).



Key features of the iOS 4.2.1 includes:

  • Multitasking, Folders and Unified Inbox – iPad users can now run their favorite apps and switch between them instantly, organize their apps with drag-and-drop simplicity using Folders and enjoy improved Mail features with a Unified Inbox, fast inbox switching and a threaded message view.
  • Game Center – allows iPad, iPhone and iPod touch users to challenge and play games with friends online.
  • AirPlay – streams music, video and photos wirelessly from iPad, iPhone and iPod touch to Apple TV with AirPlay features.
  • AirPrint – the next-generation Wi-Fi print architecture that dramatically simplifies printing by completely eliminating printer drivers.
  • Find My iPhone (or iPad or iPod touch) – free to use without a MobileMe subscription.

The latest version of iOS 4.2.1 is compatible with iPad, iPhone 3G, iPhone 4, second and third generation iPod touch (late 2009 models with 32GB or 64GB) and new iPod touch. Some of the features may not be available for certain device like Multitasking requires iPhone 3GS, iPhone 4, third generation iPod touch (late 2009 models with 32GB or 64GB) or later. The iOS 4.2.1 is now available for download to iPad, iPhone and iPod touch by syncing the device with iTunes 10.1 and click on “Download and Install” button to get the new firmware. Those who prefer the standalone firmware setup installer for iOS 4.2.1 can directly download from the below links:

  1. iPhone 4 – iPhone3,1_4.2.1_8C148_Restore.ipsw
  2. iPhone 3GS – iPhone2,1_4.2.1_8C148a_Restore.ipsw
  3. iPhone 3G – iPhone1,2_4.2.1_8C148_Restore.ipsw
  4. iPad – iPad1,1_4.2.1_8C148_Restore.ipsw
  5. iPod touch 4G – iPod4,1_4.2.1_8C148_Restore.ipsw
  6. iPod touch 3G – iPod3,1_4.2.1_8C148_Restore.ipsw
  7. iPod touch 2G – iPod2,1_4.2.1_8C148_Restore.ipsw
  8. Apple TV 2G – iOS 4.2

Update: iOS 4.3 for iPhone, iPad, iPod touch and Apple TV

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