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In iOS 6.1, users reported problems with cellular connectivity. This was addressed for the iPhone 4S in iOS 6.1.1 which "fixes an issue that could impact cellular performance and reliability for iPhone 4S." [20]
While still subject to the same limitations, iOS 7.1 did bring some slight performance improvements to the operating system on the iPhone 4. iOS 7, specifically iOS 7.1.2, is the last version of iOS to support the iPhone 4. Unlike the iPhone 4s, the iPhone 4 did not receive the iOS 8 update due to performance issues. [70] [71]
With this release, Apple did not drop support for these devices, [50] though support for the iPhone 3G and the iPod Touch (2nd generation) had already been dropped with iOS 4.3 seven months earlier due to hardware limitations and performance issues. [48] The release of iOS 5.1 brought support for the iPad (3rd generation).
iOS 4 is the fourth major release of the iOS mobile operating system developed by Apple Inc., being the successor to iPhone OS 3.It was announced at the Apple Special Event on April 8, 2010, and released on June 21, 2010. iOS 4 was the first version branded as "iOS" rather than "iPhone OS", [1] due to the release of the iPad.
iOS 7 is the seventh major release of the iOS mobile operating system developed by Apple Inc., being the successor to iOS 6. It was announced at the company's Worldwide Developers Conference on June 10, 2013, and was released on September 18 of that year.
Also added ability to sync and read books with iPhone or iPod Touch with iOS 4 and iBooks 1.1. Added ability to organize and sync PDF documents as books, and to read PDFs with iBooks 1.1 on iPad and any iPhone or iPod Touch with iOS 4. Added option to organize your apps on iOS 4 home screens into folders using iTunes.
The feature was initially only available on the iPad (1st generation) until the release of iOS 4 a few months after the release of iPhone OS 3.2, which brought the feature to all iPhone and iPod Touch models that could run the operating system, with the exception of the iPhone 3G and the iPod touch (2nd generation) due to performance issues ...
The first product to feature the A4 was the first-generation iPad, followed by the iPhone 4, fourth-generation iPod Touch, and second-generation Apple TV. [ 6 ] The last operating system update Apple provided for a mobile device containing an A4 ( iPhone 4 ) was iOS 7.1.2 , which was released on June 30, 2014 as it was discontinued with the ...