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# iPhone OS version history

This article goes over the history of the versions of iPhone OS (iOS) prior to version 4.0, when it was renamed to iOS. For the history of iOS, see [iOS version history](https://github.com/seanpm2001/WacOS/wiki/iOS-version-history/)

## iPhoneOS 1

[iPhoneOS 1](https://github.com/seanpm2001/WacOS/wiki/iPhoneOS-1/)

Version history currently unavailable

## iPhoneOS 2

[iPhoneOS 2](https://github.com/seanpm2001/WacOS/wiki/iPhoneOS-2/)

Version history currently unavailable

## iPhoneOS 3

[iPhoneOS 3](https://github.com/seanpm2001/WacOS/wiki/iPhoneOS-3/)

3.0 June 17, 2009 	Initial release; Initial Release for iPhone 3GS

3.0.1 July 31, 2009 	Bug fixes, including a security fix for SMS messages

3.1 September 9, 2009

3.1.1 September 17, 2009 	Initial release on iPod Touch (3rd generation); new features and security fixes.

3.1.2 	October 8, 2009 	Bug fixes

3.1.3 	February 2, 2010 	Bug fixes including security fixes. Final release for the first-generation iPhone and first-generation iPod Touch.

3.2	April 3, 2010 	Initial release on iPad (1st generation). Exclusive to this device; user interface changes to make better use of the tablet form factor.

3.2.1 	July 15, 2010 	Bug fixes, including a Wi-Fi bug

3.2.2	August 11, 2010 	Security fixes

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## Sources

[Wikipedia iPhone OS 1](https://en.wikipedia.org/wiki/IPhone_OS_1/)

[Wikipedia iPhone OS 2](https://en.wikipedia.org/wiki/IPhone_OS_2/)

[Wikipedia iPhone OS 3](https://en.wikipedia.org/wiki/IPhone_OS_3/)

Other sources are needed, and this article needs LOTS of improvement and original work to prevent it from being half a copy and paste from Wikipedia.

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## Article info

**Written on:** `2021 Saturday September 18th at 5:18 pm`

**Last revised on:** `2021 Saturday September 18th at 5:18 pm`

**File format** `Markdown document (*.md *.mkd *.markdown)`

**Article version:** `1 (2021 Saturday September 18th at 5:18 pm)`

***

