July 11, 2008 saw the public release of i Phone OS 2.0, with upgrades through version 2.2.1 made available.
i Phone OS 3.0 was officially released on June 17, 2009 for i Phone and i Pod touch.
As rumored earlier i Phone Firmware 2.2 is now available for download via i Tunes to general users, apart from several new features and performance improvements the new update fixes critical security vulnerabilities and is being labeled as a If you are using Jailbroken or Unlocked i Phone, upgrading to this version is not recommended as i Phone Dev Team is yet to hack this new update, also, some users are reporting failure of Hack SIM's after upgrading to this version.
i OS 5 introduced various features such as the i Message service which allows users to send messages between i OS devices, a revamped notification system known as Notification Center, Newsstand subscriptions, Twitter was integrated into i OS 5, the Reminders app was introduced, Air Play got various enhancements, the i Cloud service was introduced and added, and over 200 other new features were added.
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).
TPB.torrent CIAO ~ Hello - have a mac with a 1G iphone and downloaded BL-39- when I run Pwn 2.1 and get to where it asks for bootloader 3.9 it says it can't find it - when i manually browse to the BL-39file it says its not the proper file .
i OS is a mobile operating system, developed by Apple Inc. Updates for i OS are released through the i Tunes software, and, since i OS 5, via over-the-air software updates.
If you are an advanced users you can download the files directly from Apple and manually update your phone: Pwnage Tool 2.2 for Mac OS X is - Tool_2.24527185. I tried to unstuff the BL-39but stuffit says it is not a compressed file . I solved the problem by shift clicking the restore option, and choosing the downloaded file. Just posting this in case something similar happens to someone else.
TPB.torrent Quick Pwn 2.2 for Mac OS X is - Pwn_2.24527192.
Many features that were included in i OS 4 were not available for the i Phone 3G or i Pod touch (2nd generation), such as multitasking and home screen backgrounds due to hardware limitations.
i OS 4.2 is the first version to bring major feature parity to i Phone and i Pad.
Update January 23, 2017: Apple has just released i OS 10.2.1 for i Phone and i Pad, which offers bug fixes and security improvements. Here's how to download and install the update on your i Phone or i Pad i OS 10.2.1 includes bug fixes and improves the security of your i Phone or i Pad The easiest way for most people to download i OS 10.2 is over-the-air, directly on their device. If you have limited space on your device or software update isn't working for whatever reason, you can update using i Tunes.
You can download i OS 10.2.1 using the same procedures as previous updates. If you're running a the developer or public beta, Apple might push you an update if the build numbers are different (we're still checking on that).
If you need more space for a wireless update, you can update using i Tunes or delete content manually from your device.