iPhone SDK release history

Version
Build
Date
Notes
iOS 1.2b1 Beta 1
5A147p
March 6, 2008
Release for iPhone OS version 1.2b1. Announced at an Apple Town Hall meeting.[4]
iOS 2.0b2 Beta 2
5A225c
March 27, 2008
Release for iPhone OS version 2.0b2,[5] which added Interface Builder, an application for building graphical user interfaces for iPhone applications.[6]
iOS 2.0b3 Beta 3
5A240d
April 8, 2008
Release for iPhone OS version 2.0b3.[7]
iOS 2.0b4 Beta 4
5A258f
April 23, 2008
Release for iPhone OS version 2.0b4. This version of the SDK supports OpenGL 3D graphics, primarily used to make games,[8] and indications that some applications will be allowed to run in the background (as the iPod, Phone, and Mail applications do), something that Apple had previously stated was not possible.
iOS 2.0b5 Beta 5
5A274d
May 6, 2008
Release for iPhone OS version 2.0b5.[9]
iOS 2.0b6 Beta 6
5A292g
May 28, 2008
Release for iPhone OS version 2.0b6. The code in this update gave hints about updates to Apple's .Mac[10] service and also gave a first reference to the upcoming version of Mac OS X, version 10.6 Snow Leopard.[11]
iOS 2.0b7 Beta 7
5A331
June 9, 2008
Release for iPhone OS version 2.0b7, which unlocked Apple's .Mac replacement, MobileMe. This release was for WWDC, Apple's developer's conference, which is noted as part of the name of the iPhone OS beta download.
iOS 2.0b8 Beta 8
5A345
June 26, 2008
Release for iPhone OS version 2.0b8.[12]
iOS 2.0 Final
July 11, 2008
Release for iPhone OS version 2.0. This coincided with the launch of the App Store.
iOS 2.1 Beta 1
5F90
July 24, 2008
Release for iPhone OS version 2.1.[13] Apple notes that applications built using the 2.1 SDK will not run on the iPhone 2.0 software, and will not yet be accepted into the App Store.
iOS 2.1 Beta 2
July 30, 2008
Release for iPhone OS version 2.1.[14]
iOS 2.1 Beta 3
August 8, 2008
Release for iPhone OS version 2.1.[15]
iOS 2.1 Beta 4
August 16, 2008
Release for iPhone OS version 2.1.
iOS 2.1 Final
September 12, 2008
Release for iPhone OS 2.1.
iOS 2.2 Beta 1
5G29
September 25, 2008
Release for iPhone OS version 2.2.[16]
iOS 2.2 Beta 2
October 24, 2008
Release for iPhone OS version 2.2.
iOS 2.2 Final
9M2621
November 20, 2008
Release for iPhone OS version 2.2.
iOS 2.2.1
9M2621a
January 27, 2009
Release for iPhone OS version 2.2.1.[17]
iOS 3.0 Beta 1
March 17, 2009
Preview of iPhone OS version 3.0 and SDK 3.0 beta release.[18]
iOS 3.0 Beta 2
March 31, 2009
Release for iPhone OS version 3.0.[19]
iOS 3.0 Beta 3
April 14, 2009
Release for iPhone OS version 3.0.[20]
iOS 3.0 Beta 4
April 28, 2009
Release for iPhone OS version 3.0.[21]
iOS 3.0 Beta 5
May 6, 2009
Release for iPhone OS version 3.0.[22]
iOS 3.0 Golden Master
June 8, 2009
Final Release for iPhone OS version 3.0 for developers and private testers only.[23]
iOS 3.0 Final
June 17, 2009
Final release for iPhone OS version 3.0 for standard users was released on June 17.[23]
iOS 3.1 Beta 1
June 30, 2009
First beta release for iPhone OS version 3.1 released to developers June 30.
iOS 3.1 Beta 2
July 14, 2009
Second beta release for iPhone OS version 3.1 released to developers July 14.
iOS 3.1 Beta 3
July 27, 2009
Third beta release for iPhone OS version 3.1 released to developers July 27.
iOS 3.1 Final
September 9, 2009
Final release for iPhone OS version 3.1 for standard users was released in the Apple "It's Only Rock and Roll, but we like it" special event on September 9, 2009.
iOS 3.2 Beta 1
January 27, 2010
Initial, developer-only beta release for iPhone OS version 3.2. iPad only.
iOS 3.2 Beta 2
February 9, 2010
iPad only.
iOS 3.2 Beta 3
February 23, 2010
iPad only.
iOS 3.2 Beta 4
10M2144
March 9, 2010
iPad only.
iOS 3.2 Beta 5
10M2148
March 17, 2010
iPad only.
iOS 3.2 Golden Master
March 29, 2010
iPad only.
iOS 3.2 Final
10M2148
April 3, 2010
First public release of iPhone OS version 3.2. iPad only.
iOS 4.0 Beta 1
8A230m
April 8, 2010
First beta release for iOS version 4.0 released to developers April 8.
iOS 4.0 Beta 2
8A248c
April 20, 2010
Second beta release for iOS version 4.0 released to developers April 20.
iOS 4.0 Beta 3
8A260b
May 4, 2010
Third beta release for iOS version 4.0 released to developers May 4.
iOS 4.0 Beta 4
8A260b
May 18, 2010
Fourth beta release for iOS version 4.0 released to developers May 18.
iOS 4.0 Golden Master
8A293
June 7, 2010
Golden Master release for iOS version 4.0 released to developers June 7.
iOS 4.0 Final
8A293
June 21, 2010
The final release of the iOS 4.0.
iOS 4.1 Beta 1
July 14, 2010
First beta release for iOS version 4.1 released to developers July 14.
iOS 4.1 Beta 2
July 27, 2010
Second beta release for iOS version 4.1.
iOS 4.1 Beta 3
August 3, 2010
Third beta release for iOS version 4.1.
iOS 4.1 Final
10M2309
September 8, 2010
Final release for iOS version 4.1 released to developers September 8.
iOS 4.2 Beta 1
September 15, 2010
First beta release for iOS version 4.2.
iOS 4.2 Beta 2
September 28, 2010
Second beta release for iOS version 4.2.
iOS 4.2 Beta 3
October 12, 2010
Third beta release for iOS version 4.2.
iOS 4.2 Golden Master
November 1, 2010
Golden Master seed release for iOS version 4.2.
iOS 4.2 Golden Master
November 18, 2010
Second Golden Master seed release for iOS version 4.2, numbered as 4.2.1.
iOS 4.2 Final
November 22, 2010
Final release for iOS version 4.2 released to developers November 22.
iOS 4.3 Beta 1
8F5148b
January 12, 2011
Drops support for iPhone 3G, and second-generation iPod touch.
iOS 4.3 Beta 2
9F5135d
January 19, 2011
iOS 4.3 Beta 3
8F5166b
February 1, 2011
iOS 4.3 Golden Master
8F190
March 3, 2011
Also includes Xcode 4 golden master to support iOS 4.3.
iOS 4.3 Final
8F190
March 9, 2011
Also includes Xcode 4 final.
iOS 5.0 beta 1
9a5220p
June 6, 2011
iTunes 10.5 beta 1
iOS 5.0 beta 2
9A524Bd
June 24, 2011
iTunes 10.5 beta 2
iOS 5.0 beta 3
9A5259f
July 11, 2011
iTunes 10.5 beta 3
iOS 5.0 beta 4
9A5274d
July 22, 2011
iTunes 10.5 beta 4
Xcode 4.2 Preview 4
iOS 5.0 beta 5
9A5288d
August 6, 2011
iTunes 10.5 beta 5
Xcode 4.2 Preview 5
iOS 5.0 beta 6
9A5302b
August 19, 2011
iTunes 10.5 beta 6
Xcode 4.2 Preview 6
iOS 5.0 beta 7
9A5313e
August 31, 2011
iTunes 10.5 beta 7
Xcode 4.2 Preview 7
iOS 5.0 Golden Master
9A334
October 4, 2011
iTunes 10.5 beta 9
Xcode 4.2 Golden Master
iOS 5.0 Final
9A334
October 12, 2011
iTunes 10.5
Xcode 4.2
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