IPhone 4S due to the relatively aged hardware. In fact, some users often reported that performance on the 4S is very slow, similar to how iOS 7 ran on the iPhone 4, and suggesting that they should not upgrade due to battery draining issues and hanging up on calls. Meanwhile, Apple released iOS 8.1.1, which brought slight improvements to the phone and the iPad 2, but it still did not run as fast as newer models. On June 8, 2015, Apple announced at the WWDC that the iPhone 4S would support iOS 9. This makes it the first iPhone to support 5
IPod Touch date has been introduced with the same release number of iOS as the contemporary iPhone model. Successive updates to iOS since the initial release in 2007 have released additional features. iPhone OS 2.0, released on July 11, 2008, introduced the App Store, which allowed third-party applications for the first time. iPhone OS 3.0, released on June 17, 2009, added features such as cut, copy, and paste, data tethering and push notification support. iOS 4.0, released on June 21, 2010, introduced iBooks, FaceTime, and multitasking. It dropped support for the first generation iPod Touch. In June 2011, iOS 5, the fifth