|A version of the iOS operating system|
iOS 5.0.1 running on an iPhone 3GS.
|Source model||Closed, with open source components|
|Initial release||October 12, 2011|
|Latest release||5.1.1 / May 7, 2012|
|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)|
|Limited third-party support|
iOS 5 is the fifth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 4. It was announced at the company's Worldwide Developers Conference on June 6, 2011, and was released on October 12, 2011. It was succeeded by iOS 6 on September 19, 2012.
New features of the software include iCloud, Notification Center, new apps, over-the-air software updates, and many others.
iOS 5.0.1 was released on November 10, 2011 as the first update to iOS 5. The update included fixes for battery issues.
In previous iOS versions, notifications popped up on the screen as dialog boxes, interrupting the current activity. In iOS 5, notifications are revamped, and show up as a temporary banner at the top of the screen. Recent notifications can also be accessed by pulling a "Notification Center" down from the top of the screen. Users who prefer the old notification system can keep it by choosing the appropriate option in the Settings menu.
iOS 5 introduces iCloud, Apple's cloud storage service. The new service allows users to synchronize their music, pictures, videos, and application data across all of their iCloud-enabled devices.
iOS 5 enables wireless system updates on supported devices, meaning a computer and iTunes aren't necessary to update devices. Both activation of new devices and updates can be done wirelessly.
iOS 5 features deep Twitter integration. Users are able to sign in to Twitter directly from the Settings menu. Photos can be "tweeted" directly from the Photos or Camera apps, and users are also able to tweet from the Safari, YouTube, and Google Maps apps.
Multitasking gestures debut on iPad with the release of iOS 5. Multitasking allows users to jump between apps without double-tapping the home button or first going to the home screen. Multitasking gestures were only available on the iPad 2.
The iPad keyboard could be undocked from the bottom of the screen, and could be split into two half-keyboards.
The first iOS 5 release allowed the Camera app to be easily accessed from the lock screen for the first time. Users double-clicked the home button, a camera icon would appear next to the "Slide to unlock" message, and users would click on it to directly access the camera. The iOS 5.1 update streamlined the process, dropping the home button double-click procedure, but requiring users to swipe up the camera icon. For security purposes when the device is locked with a passcode, this method of accessing the camera only allows access to the Camera app, and no other features of the device.
iMessage, a new instant messaging service built into the Messages app, allows anyone with an iOS 5 device to send both basic and multimedia messages to anyone else with a compatible iOS 5 device. In contrast to SMS, messages sent through iMessage use the Internet rather than regular cellular texting, but also in contrast to regular SMS, Android and BlackBerry devices are not compatible with the service. iMessages are synchronized across the user's devices, and are color-coded blue, with regular SMS in green.
Newsstand does not act as a native app, but rather a special folder. When selected, it shows icons for all of the periodicals that the user has subscribed to, such as newspapers and magazines. New issues are downloaded automatically.
Following user complaints, Apple officially confirmed that the iOS 5 update had negatively impacted battery life for some iPhone 4S users, and stated that an upcoming software update would fix the issues. The iOS 5.0.1 update fixed bugs related to battery issues.
In November 2011, Engadget reported that the iOS 5 update caused Wi-Fi connection drops for some users. The report also wrote that "The recent iOS 5.0.1 update certainly hasn't fixed the matter, either", and questioned whether the events were unrelated or part of a larger issue.
Some users of the iPhone 4S reported issues with the SIM card in iOS 5, being given error messages about "Invalid SIM" and "SIM Failure". Apple released a second software build of the 5.0.1 update designed to fix SIM card issues.
Some users of the iPhone 4S reported the random appearance of echoes during phone calls made with earphones in the initial release of iOS 5. The other party in the call was sometimes unable to hear the conversation due to this problem.
Many aspects of iOS 5 received positive reviews, including the new notification center, the ability to sync and update wirelessly, iMessage, and more. Richmond Shane of Telegraph said "iOS 5 is a brilliant upgrade to an already brilliant operating system. Different people look for different things in a mobile operating system. That's why some people prefer BlackBerry, Android or Windows Mobile. I value ease of use and attention to detail in design. With iOS 5, Apple continues to deliver the best user experience available."
Richard Goodwin of Know Your Mobile said "All in all, we reckon iOS 5 is everything it needs to be a more. We can’t wait to get our teeth stuck into it as soon as it’s released in the Autumn of 2011."
For the second time, support for some devices was dropped, specifically the iPhone 3G and the iPod Touch (2nd generation). Supported devices on this release include the iPhone 3GS onwards, the iPod Touch (3rd generation) onwards, and the original iPad onwards.
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