iOS 4

iOS 4
Version of iOS
IOS4 logo.png
IOS 4 Homescreen.png
Version3.x
CodenameApex (4.0)
Baker (4.1)
Jasper (4.2 - 4.2.4)
Phoenix (4.2.5 - 4.2.10)
Durango (4.3)
ArchitectureARM32
Latest build8L1 (4.3.5)
Release date2010-06-21
Replaces
iPhone OS 3
Replaced by
iOS 5

iOS 4 is the fourth version of iOS that was released on 21 June 2010. It was announced on 8 April 2010 at the Apple Special Event. It is the first iOS version issued under the "iOS" rebranding, dropping the "iPhone OS" naming convention of previous versions due to the introduction of the iPad, which shipped with this version of the OS. On the iPhone 3G and the second-generation iPod Touch, those devices running this OS still has the "iPhone OS 4" branding.

New features and changes[edit | edit source]

Home screen[edit | edit source]

  • Folders have been added for app organization.
  • The home screen wallpaper can now be changed.[a]
  • The home screen now allows showing up to 135 pages of apps (2,160 apps in total).

Multitasking[edit | edit source]

Multitasking support via the App Switcher has been added.[a] It can be accessed by double-clicking the home button.

Camera[edit | edit source]

  • Tap-to-focus has been added.
  • The LED flash can now be used while taking photos.[b]
  • Support for HDR photo capture has been added.[b]
  • Digital zoom up to 5x has been added.[b]

FaceTime[edit | edit source]

FaceTime has been added, which allows for video calling.[b]

iBooks[edit | edit source]

The iBooks app is now supported on iPhone. It was previously only available for the iPad.

Game Center[edit | edit source]

iOS 4.1 adds Game Center, which allows users to play and challenge friends in games.[a]

Mail[edit | edit source]

  • The Mail app now features a unified inbox, which can be used to display emails from all added accounts.
  • Support for MobileMe e-mail aliases and multiple Exchange accounts has been added.

Safari[edit | edit source]

  • The default search engine can now be set to Bing.
  • iOS 4.2.1 adds the "Find on page" feature.

App Store[edit | edit source]

Users can now gift apps to other Apple IDs in the App Store

Keyboard[edit | edit source]

  • The spell check feature has been added.
  • iOS now supports the use of Bluetooth keyboards.

List of known builds[edit | edit source]

iOS 4.0[edit | edit source]

iOS 4.0.1[edit | edit source]

iOS 4.0.2[edit | edit source]

iOS 4.1[edit | edit source]

iOS 4.1.1[edit | edit source]

iOS 4.2[edit | edit source]

iOS 4.2.1[edit | edit source]

iOS 4.2.2[edit | edit source]

iOS 4.2.3[edit | edit source]

iOS 4.2.4[edit | edit source]

iOS 4.2.5[edit | edit source]

iOS 4.2.6[edit | edit source]

iOS 4.2.7[edit | edit source]

iOS 4.2.8[edit | edit source]

iOS 4.2.9[edit | edit source]

iOS 4.2.10[edit | edit source]

iOS 4.3[edit | edit source]

iOS 4.3.1[edit | edit source]

Leaked build 8G4

iOS 4.3.2[edit | edit source]

Leaked build 8H7
Leaked build 8H8

iOS 4.3.3[edit | edit source]

Leaked build 8J2
Leaked build 8J3

iOS 4.3.4[edit | edit source]

Leaked build 8K2

iOS 4.3.5[edit | edit source]

Leaked build 8L1

Notes[edit | edit source]

  1. 1.0 1.1 1.2 iPhone 3GS and iPhone 4 only
  2. 2.0 2.1 2.2 2.3 iPhone 4 only