IOS 5
| A version of the iOS operating system | |
 |
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iOS 5 running on an iPhone 4S.
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| Developer | Apple Inc. |
|---|---|
| Source model | Closed, with open source components |
| Released to manufacturing |
October 12, 2011 |
| Latest release | 5.1.1 / May 7, 2012 |
| Platforms |
iPhone 3GS iPhone 4 iPhone 4S iPod touch (3rd generation) iPod touch (4th generation) iPad (1st generation) iPad 2 iPad (3rd generation) |
| Kernel type | Hybrid (XNU) |
| License | Proprietary EULA except for open-source components |
| Preceded by | iOS 4 |
| Succeeded by | iOS 6 |
| Official website | iOS 5 at the Wayback Machine (archived September 10, 2012) |
| Support status | |
| Unsupported as of Early 2014 | |
iOS 5 is the fifth major release of the iOS mobile operating system designed by Apple Inc. New features of the software include iCloud, Notification Center, new apps, over-the-air software updates, and many others. It was announced at the company's Worldwide Developers Conference (WWDC) on June 6, 2011, and was released on October 4, 2011. It had the fewest updates out of all the major iOS versions. It was preceded by iOS 4 (final version was 4.3.5) and succeeded by iOS 6, which was released on September 19, 2012.
iOS 5 was introduced on June 6, 2011 during WWDC 2011. At the same event, Apple introduced Mac OS X Lion and announced its cloud-based media service, iCloud.
On October 4, 2011, Apple held an event at the 4 Infinite Loop building at its headquarters in Cupertino, California. While other items were discussed, the main focus was the unveiling of the iPhone 4S and its new, exclusive Siri software. The release date for iOS 5, October 12, was announced at this event.
The iPhone 4S came with iOS 5 pre-installed, but older units required the update to be installed through iTunes. However, when the update was first released, many users received error messages upon attempting to download it, and some had warnings that their devices could not be restored. It was thought that Apple's servers were simply not able to keep up with the demand, causing as many as half of the initial requests for the update to fail.
iOS 5.0.1 was released on November 10, 2011 as the first update to iOS 5. The update attempted to fix battery issues. On December 12, 2011, the update was released to the iPhone 4S.
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