Updating airport firmware
The 4.2 version sequence continued for the CDMA phone while 4.3 was released for all other products On June 6, 2011, Apple previewed i OS 5, Apple TV 4.4 beta and the i OS SDK 5 beta along with i Cloud beta among other products.
Prior to the public release of i Phone OS 2.0, Apple held a keynote event to announce the i Phone OS Software Development Kit ("SDK") to developers. i Phone OS 3 became available to users and developers and the i Phone 3GS to go with it. This release added features such as copy and paste, and MMS.i Phone OS 1 is the first iteration of Apple's touch-centric mobile operating system.No official name was given on its initial release; Apple marketing literature simply stated the i Phone runs a version of Apple's desktop operating system, OS X.Major new i OS releases are announced yearly during the Apple Worldwide Developers Conference (WWDC), and are usually released in September of the same year, usually coinciding with the release of new i Phone models.The most recent stable release, i OS 10.2.1, was released on January 23, 2017, i OS did not have an official name until the official release of the i Phone software development kit (i Phone SDK) on March 6, 2008.As of i OS 4.0, Apple no longer charges money for i Pod touch updates.
As of October 23, 2011, two versions of i OS were never released.
i OS 4.2 is the first version to bring major feature parity to i Phone and i Pad.
The release of the CDMA i Phone for Verizon Wireless saw a branching of i OS.
The first generation i Pod touch and i Phone have i Phone OS 3.1.3 as their newest available version. On June 21, 2010, i OS 4.0 (formerly i Phone OS) was released to the public and was made available only to the i Pod touch and i Phone.
i OS 4.0 was announced to have over 1500 new APIs for developers, and included the highly anticipated multitasking feature.
i OS 5.0 supported all i Pad models, i Phone 3GS, i Phone 4 GSM & CDMA, i Phone 4S, and the i Pod touch (3rd & 4th generation).