The iOS 5 is an operating system that was designed and developed especially for iPhone and iPad by Apple from 2011 to 2012. The system has been released on October 12, 2011, and was preinstalled on the iPhone 4s, iPod touch 4th Generation, iPad 3rd Generation, and Apple TV 3rd Generation. This software gets the last update (5.1.1) on May 25, 2012, and later has been replaced by a newer version of iOS 6.
iOS 5 revamped notifications, adding temporary banners that appear at the top of the screen and introducing the Notification Center, a central location for all recent notifications. The operating system also added iCloud, Apple’s cloud storage service for synchronization of content and data across iCloud-enabled devices, and iMessage, Apple’s instant messaging service.
For the first time, system software updates can be installed wirelessly, without requiring a computer and iTunes. iOS 5 also featured deep integration with Twitter, introduced multitasking gestures on iPads, and added an easily accessible camera shortcut from the lock screen.
Today iOS 5 is 11 years old!

iOS 5 General Information
Released | October 12, 2011 |
Original Price | Free |
System Requirements | iPhone 3Gs iPhone 4 iPhone 4s iPod touch 3rd Generation iPod touch 4th Generation iPad iPad 2 iPad 3rd Generation Apple TV 2nd Generation Apple TV 3rd Generation |
Distribution | iTunes Over-the-Air Apple TV Software Update |
Versions
Versions | Build | Release Date |
iOS 5.0 | 9A334 | October 12, 2011 |
iOS 5.0.1 | 9A405 9A406 | November 10, 2011 December 12, 2011 |
iOS 5.1 | 9B176 9B179 | March 7, 2012 |
iOS 5.1.1 | 9B206 9B208 | May 7, 2012 May 25, 2012 |