Difference Between iOS 4.2.1 and iOS 4.3.2

When comparing the differences between iOS 4.2.1 and iOS 4.3.2, we should remember that several updates were released between iOS 4.2.1 and iOS 4.3.2. To be more specific, the patches after 4.2.1 are as follows: 4.2.5, 4.2.6, 4.2.7, 4.2.8, 4.2.9, 4.2.10, 4.3, 4.3.1, and finally 4.3.2. You can't acquire iOS 4.3.2 without also installing the previous eight fixes.

So the differences between iOS 4.3.2 and iOS 4.2.1 may not be due to the most recent patch alone but rather to the accumulation of updates. Support for CDMA networks is one of the changes missing from iOS 4.2.1. Initially, until iOS 4.2.1, Apple exclusively issued iPhones for GSM networks, leaving CDMA users in the dark.

When it comes to new features, there are a few that stick out. The first is how Apple has made it possible for third-party apps to use Airplay. Airplay allows the app to broadcast audio, video, and images to devices that support Airplay content. This allows you to wirelessly watch movies and images on your TV or stream music to Airplay-compatible speakers.

The Nitro Javascript engine, utilized in Safari, is another enhancement in iOS 4.3.2. Safari can now render Javascript websites faster and with fewer resources. In addition, various adjustments and fixes were added between iOS 4.3.2 and iOS 4.2.1 to enhance speed and solve discovered flaws.

The newest version of Apple's iOS, the company's proprietary operating system for iDevices, is OS 4.3.2. iOS 4.2.1 is now the most extensively utilized operating system in iDevices. Many people wait for iOS 4.3 to be stable before upgrading their operating system. Within two months following the introduction of iOS 4.3, Apple released two updates − iOS 4.3.1 on March 25, 2011, and iOS 4.3.2 on April 14, 2011. Both are minor software upgrades for iOS 4.3 that provide enhancements and bug fixes.

The system is well-known for its clean and professional user interface, the best App store in the world, the Safari browser, quick boot, and application access. The distinction between iOS 4.2.1 and 4.3.2 covers all of the new features in iOS 4.3, iOS 4.3.1, and iOS 4.3.2's new upgrades.

Read this article to find out more about iOS 4.2.1 and iOS 4.3.2 and how they are different from each other.

What is iOS 4.2.1?

The most current upgrade to Apple's iOS operating system is iOS 4.2.1. iOS 4.2.1 is a free upgrade for any iPhone, iPad, and iPod touch models running iOS 4.0 or later. iOS 4.2.1 provides bug fixes and enhancements such as stronger Bluetooth connectivity, longer battery life for the iPhone 3G, and the ability to sync Exchange contacts on the iPhone 4.

Furthermore, iOS 4.2.1 includes AirPrint, a new tool that allows users to print images, documents, and web pages wirelessly from their iOS devices. iOS 4.2.1 is now available as a free download from Apple's App Store.

iOS 4.2.1 was introduced alongside the iPhone 4 in 2010. Until now, iOS 4.2.1 has been the most extensively used operating system and the first OS to be regarded as a benchmark platform for smartphones. Though it received criticism for its lack of support for Adobe Flash player, tight adherence to PC activation, and strong ties to iTunes for every media program, it was adored by Apple devotees for its clean and simple appearance.

To address the issue of location tracking, Apple has opted not to back up the location database to iTunes and to destroy the location database when the location service is turned off. These are now included in the current software upgrade.

What is iOS 4.3.2?

The iOS 4.3.2 software update includes bug patches that might allow an unauthorized individual to access specific components of the device, as well as other stability enhancements. iOS 4.3.2 is now available for the iPhone 4 (GSM variant), the iPhone 3GS, the iPod touch (4th generation), and the iPad 2.

iOS 4.3.2 includes all of the features seen in iOS 4.3 and iOS 4.3.1, as well as certain upgrades and bug fixes. The latest upgrades address a screen freezing issue that certain iOS 4.3 and 4.3.1 users experienced when attempting to have a FaceTime conversation. It also resolves a problem that certain iPad users were experiencing while connecting to overseas 3G networks.

Differences between iOS 4.2.1 and iOS 4.3.2

The following table highlights the major differences between iOS 4.2.1 and iOS 4.3.2 −


iOS 4.2.1

iOS 4.3.2


iOS 4.2.1 is also the final version of iOS that is compatible with the second and fourth-generation iPod Touches.

iOS 4.3.2 is the most recent version of iOS that is backward compatible with the original iPhone and iPhone 3G.

Supportable features

Support for the new multitasking features offered in iOS 4 was included in iOS 4.2.1.

iOS 4.3.2 now supports the iPad 2 and Verizon iPhone.


On November 22, 2010, Apple launched iOS 4.2.1.

On March 25, 2011, Apple launched iOS 4.3.2.


iOS 4.2.1 does not have a javascript engine

A new Javascript engine is included in iOS 4.3.2.


In iOS 4.2.1, there is a perceptible delay between pressing the home button and returning to the home screen.

iOS 4.3.2 includes several performance-enhancing improvements and fixes.


Although there are some small modifications between iOS 4.2.1 and iOS 4.3.2, the differences are not significant enough for most users to necessitate an upgrade. If you have an iPhone or iPad running iOS 4.2.1, we recommend waiting until Apple publishes a major upgrade before changing the software on your device.

However, if you are having issues with your current version of iOS or need to use one of the new features in iOS 4.3.2 (such as AirPlay mirroring), then updating to the latest version is strongly advised.