July 11, 2008 saw the public release of i Phone OS 2.0, with upgrades through version 2.2.1 made available.June 17, 2009 was the release date for i Phone OS 3.0.It was updated through (and including) version 3.1.3 (release date February 2, 2010).
provides updates to the i OS operating system for the i Phone, i Pad, and i Pod Touch through i Tunes, and since i OS 5.0, over-the-air software updates.
With the announcement of i OS 5.0, on June 6, 2011, a USB connection to i Tunes was no longer needed to activate i OS devices; data synchronizing can happen automatically and wirelessly through Apple's i Cloud service.
The most recent update, i OS 9.3.4, was released on August 4, 2016 Apple's i OS did not have an official name until the release of the i Phone software development kit (i Phone SDK) on March 6, 2008.
This won't work for every Windows Phone out there, only those that are officially designated for the 7.8 update, so your experience will vary.
If you don't get the update, it can mean one of two things.
On the second point, we're not too confident generation one devices or Sprint's Arrive will ever "officially" get this update, which is why try as they might this method will never work.
For you folks, you'll have to do the more tricky manual CAB method.
Before then, Apple marketing literature simply stated that their i Phone runs a version of OS X, a reference to i OS' parent operating system. It was renamed i OS on June 7, 2010, as, with the introduction of the i Pad, and the existence of the i Pod Touch, the i Phone was no longer the only device to run the mobile operating system.
i OS 4 was the first major release to reflect this change.