IOS

The version history of iOS (formerly iPhone OS) began with the release of the iPhone on June 29, 2007. iOS is the operating system that runs on Apple Inc.'s mobile devices such as the iPhone, iPod Touch, and iPad. This operating system also runs on the Apple TV, but the user interface is different.

Apple provides updates to the operating system for the iPhone, iPad and iPod Touch system through iTunes, similar to the way that other iPods are updated, and touts this as an advantage compared to other mobile phones and devices. Security patches, as well as new and improved features, are released in this fashion.

Overview
Apple's iOS did not have an official name until the release of the iPhone software development kit (iPhone SDK) on March 6, 2008. Before then, Apple marketing literature simply stated that the iPhone runs "OS X", a reference to iOS's parent, Mac OS X. When introduced, it was named iPhone OS. It was renamed iOS on June 7, 2010, presumably since it is now designed for three devices other than the iPhone. As of 6/22/11 the current version of iOS is 4.3.3 for iPhone, iPod Touch, and iPad as well as 4.3 for the Apple TV second generation. However, the first generation iPod Touch and iPhone have iOS 3.1.3 as their latest version. The Developer Beta for version 3.0 was made available on March 17, 2009, with iOS 3.0 being released June 17, 2009.

On April 8, 2010, Apple previewed iOS 4.0 to the public, and launched a beta of the 4.0 firmware and SDK. 4.0 beta had only been available to registered developers, and the final version was released on June 21, 2010. 4.0 is reported to have over 1500 new APIs for developers, with the highly anticipated multitasking feature.

On May 30th 2011 Apple previewed iOS 5 and released a beta to developers. New features include iCloud, Notifications, iMessage, an updated Safari, Newsstand, Twitter integration, Reminders, Better camera app, photo editing, Better mail, an improved keyboard for iPad users, And the long awaited ability to use your iDevice without EVER needing to use a computer. Ios 5 is set to ship to all users this fall.

Apple concurrently provides the same version of the iOS for the iPod Touch. iPhone users receive all software updates for free, while iPod Touch users were charged for the 2.0 and 3.0 major software updates. As of iOS 4.0, Apple no longer charges for iPod Touch updates.

Milestones
As of November 18, 2010, iOS 4.2 is the first and only update that has never been released to the general public. However, iOS 4.2 is replaced by 4.2.1 sporting the same features as iOS 4.2, while correcting bugs from 4.2.

On November 22nd, 2010 iOS 4.2.1 (marketed as 4.2) was publicly released to the iPhone (3G, 3GS, 4), iPad, and iPod Touch (2nd Gen or later). As with previous iOS releases, not all devices are compatible of the same features. iOS 4.2, designed for iPad, enabled the iPad to use the key features of iOS 4 (Multitasking, create folders, use Game Center).

1.x: Initial release of the OS
{| class="wikitable" style="width:100%; font-size:90%;" ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features ! style="white-space:nowrap;"|

1.0.0
! style="white-space:nowrap;"|
 * style="white-space: nowrap;" | 1A543a
 * 03.11.02_G
 * June 29, 2007
 * Initial release on iPhone
 * Initial release on iPhone

1.0.1
! style="white-space:nowrap;"|
 * style="white-space: nowrap;" | 1C25
 * 03.12.08_G
 * July 31, 2007
 * Safari security update
 * Safari security update

1.0.2
Bug Fix Release
 * style="white-space: nowrap;" | 1C28
 * 03.14.08_G
 * August 21, 2007
 * Items deleted on phone no longer sync back to phone
 * Able to process multi-line addresses in Maps
 * Custom ringtones no longer lost on restore

! style="white-space:nowrap;"|

1.1

 * style="white-space: nowrap;" | 3A100a

3A101a, ! style="white-space:nowrap;"|
 * September 14, 2007
 * Initial release on iPod Touch 1st generation
 * iTunes Music Store with home screen icon
 * Initial release on iPod Touch 1st generation
 * iTunes Music Store with home screen icon

1.1.1

 * style="white-space: nowrap;" | 3A109a

3A110a ! style="white-space:nowrap;"|
 * 04.01.13_G
 * September 27, 2007
 * This update is also called the iPhone "September '07" update by Apple
 * Louder speakerphone and receiver volume
 * Home button double-click shortcut to phone favorites or music controls
 * Spacebar double-tap shortcut to intelligently insert period and space (i.e.: ". ")
 * Mail attachments are viewable in portrait and landscape modes
 * Stocks and cities in Stocks and Weather can be reordered
 * Apple Bluetooth Headset battery status in the Status Bar
 * Support for TV out
 * Preferences to turn off EDGE/GPRS when roaming internationally (Data Roaming on/off option)
 * New Passcode lock time intervals
 * Adjustable alert volume
 * New interface for the Calculator application.
 * New interface for the Calculator application.

1.1.2
! style="white-space:nowrap;"|
 * style="white-space: nowrap;" | 3B48b
 * 04.02.13_G
 * November 12, 2007
 * Battery charge level shown in iTunes
 * International language & keyboard support
 * Patched the TIFF security bug
 * Adds custom ringtone field
 * Bug fixes
 * Bug fixes

1.1.3
! style="white-space:nowrap;"|
 * style="white-space: nowrap;" | 4A93
 * 04.03.13_G
 * January 15, 2008
 * Commonly called the iPhone "January '08 Update" and January Software Upgrade by Apple
 * Mail, Maps, Stocks, Weather and Notes apps for iPod Touch
 * Recent calls contact details now show most recent call times
 * Google Maps on iPhone gains the 'Locate Me' feature which can determine the phone's approximate location, using a combination of cellular triangulation and Wi-Fi data from Skyhook Wireless; also adds hybrid map support and the 'Drop Pin' feature.
 * Icons on the home screen can be rearranged and placed on multiple home screens (up to nine).
 * iTunes gift cards can be redeemed on the iTunes Music Store.
 * Movies downloaded through iTunes have chapter support.
 * Music has lyrics-support feature
 * Web Clips can be added to (and subsequently removed from) the home screen.
 * SMS messages can be sent to multiple contacts.
 * SMS storage capacity increased from 1,000 to 75,000 messages
 * Default Gmail IMAP setup for new accounts (previously was defaulted as POP3).
 * Multi-touch keyboard (e.g., simultaneously pressing "Shift" + "a")
 * The clock timer now remembers the last used options. (bug fix)
 * Incoming SMS messages now prompts the user to "Close" or "Reply" (previously "Ignore" or "Reply"). Pressing either option now marks the message as "seen".
 * Labels for contact data can now be deleted.
 * Applications on the phone no longer run as root; they run as the user "mobile" instead
 * Ability to listen to music through a bluetooth headset by going to the voicemail and choosing "bluetooth" as the audio source no longer works (still works as long as phone is not locked or voicemail screen is active).
 * Ability to listen to music through a bluetooth headset by going to the voicemail and choosing "bluetooth" as the audio source no longer works (still works as long as phone is not locked or voicemail screen is active).

1.1.4
! style="white-space:nowrap;" |
 * style="white-space: nowrap;" | 4A102
 * 04.04.05_G
 * February 26, 2008
 * Bug Fix and Enhancement Release
 * SMS scramble order fix
 * More carriers names now fit without scrolling — for roaming on other carriers
 * The camera's frame rate dramatically improved
 * Interface speed improvements
 * Interface speed improvements

1.1.5
iPod Touch only ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features
 * style="white-space: nowrap;" | 4B1
 * July 15, 2008
 * July 15, 2008
 * Security fixes for iPod Touch users who choose not to pay for upgrade to version 2.0
 * - class="sortbottom"
 * }

2.x: Second major release of the OS
2.0, the second major release of the iOS, became available with the release of the iPhone 3G. Devices running 1.x are upgradable to this version. The version of the OS introduces the App Store, making third-party applications available to the iPhone and iPod Touch. {| class="wikitable" style="width:100%; font-size:90%;" ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features ! style="white-space:nowrap;"|

2.0

 * style="white-space: nowrap;" | 5A347
 * 04.05.04_G

01.45.00
 * July 11, 2008
 * Initial release on iPhone 3G
 * Paid upgrade for iPod Touch
 * Added Language Support
 * Norwegian, Swedish, Danish, Finnish, Polish, Dutch, Korean, and Brazilian Portuguese language interface in iPhone, previously these languages were only in the iPod Touch since 1.1.1
 * Extra keyboard languages including Chinese and Korean and Russian
 * Support for Traditional and Simplified Chinese handwriting recognition
 * Support for Traditional and Simplified Chinese handwriting recognition


 * Mail/Contacts/Calendars
 * Grouped settings
 * Mail
 * Push e-mail
 * Ability to select an outgoing email account within Mail application
 * Support for BCC in Mail application
 * Multiple email delete/move
 * Ability to view MS Office attachments
 * Ability to view iWork attachments, including Pages, Numbers, and Keynote
 * Contacts
 * Contacts icon on "Home" screen (iPhone only, it was previously on the iPod Touch)
 * Ability to search contacts
 * Global Address List
 * Push contacts
 * Ability to import SIM contacts
 * Calendar
 * Multiple calendars supported in Calendar with color coding (desktop colors only preserved if using Mobile Me)
 * New "Calendar" menu in "Settings"
 * Push calendar


 * Enterprise enhancements
 * Enforced security policies
 * Device configuration
 * Remote wipe


 * iPod
 * Video can be shown in either landscape orientation (instead of just landscape left)
 * Videos in playlists & music videos can be shown in portrait or landscape orientation
 * Sound fade-out when exiting a video


 * Other
 * Certificates and Identities
 * WPA2/802.1X
 * Ability to turn Wi-Fi back on while in Airplane mode
 * Cisco IPsec VPN support
 * Ability to take screen captures
 * Ability to save pics from Safari or Mail to Photos
 * Bonjour service discovery protocol
 * Support for SVG
 * Addition of Parental controls
 * App Store (to manage third-party applications) with home screen icon
 * Password letters are momentarily visible while typing
 * Ability to turn Location Services on or off
 * Applications that use Location Services now prompt user for confirmation 3 times.
 * Tapping to scroll to top shortcut
 * Updated calculator with extra features in portrait mode, a scientific calculator in landscape mode and an updated icon.
 * Updated iTunes with a new icon and reordered category icons within iTunes application.
 * Camera now supports Geotagging
 * YouTube plugin for Safari

! style="white-space:nowrap;"|

2.0.1

 * style="white-space: nowrap;" | 5B108
 * 04.05.04_G

01.48.02 Bug Fix Release ! style="white-space:nowrap;"|
 * August 4, 2008
 * Performance and Stability of Contacts and Calendar applications dramatically improved
 * Performance while flipping to landscape mode in Safari improved
 * Performance in Mail app improved
 * Release improves application crash rates
 * Keyboard responsiveness improved

2.0.2

 * style="white-space: nowrap;" | 5C1
 * 04.05.04_G

02.08.01 Bug Fix Release ! style="white-space:nowrap;"|
 * August 18, 2008
 * Improved communication with 3G networks
 * Transition from music list to Cover Flow has changed
 * Tilt to left from landscape no longer switch to portrait when watching video, fixes 2.0 bug
 * The "Update All" button in the App Store's update tab has been removed

2.1

 * style="white-space: nowrap;" | 5F136

5F137

5F138

9M2517
 * 04.05.04_G

02.11.07
 * September 9, 2008

September 12, 2008,
 * Free for iPod Touch users who have upgraded to iOS 2.0.
 * Initial Release on iPod Touch 2nd Generation (as 2.1.1)
 * Companion Changes in/with iTunes 8 for this release
 * Displays capacity and used space of information on iPhone.
 * Dramatically reduced time to backup to iTunes
 * Does not remove all media after restore
 * Faster firmware installation and data sync
 * Application updates downloaded from iTunes have new finder naming convention
 * Application updates downloaded from iTunes have new finder naming convention


 * Bug Fixes and Performance Enhancements
 * Security fix to prevent from bypassing the double home button exploit
 * Fixed bugs causing hangs and crashes for users with lots of third party applications
 * Faster installation and updating of 3rd party applications
 * Updating applications keeps their icons in place on the home screen.
 * Improvements to Mail stability
 * Improved email reliability, notably fetching email from POP and Exchange accounts
 * Faster loading and searching of contacts
 * Auto-correct now appears above the text instead of below (fixing a usability problem people were having where auto-correct would appear above the first row of keys).
 * Smoother browsing in Safari, particularly when scrolling up/down on a web page
 * Significantly better battery life for most users
 * Decrease in call set-up failures and dropped calls
 * Improved accuracy of the 3G signal strength display.
 * Some Bluetooth headsets which didn't originally work with visual voicemail on previous firmware versions have been reported to be working on 2.1.
 * The 12/24 hour clock which has been available in previous versions is now usable to UK iPhone users.
 * Improved way of creating the "Application Map" on reboot fixes the "ALoD" issue.
 * Third-party application settings are loaded after loading the main Settings.
 * With the UK English keyboard setting, when entering URLs, holding down the '.com' button would bring up shortcuts to other TLDs, but for some reason it would drop '.net' to make room for '.co.uk'. 2.1 adds '.net' for the UK English keyboard.
 * Apple have fixed the grammar in the App Store when all apps up to date. Prior to 2.1, the update page would display the text "All Apps Are Up-To-Date." (hyphenated with a period). The update page now displays the text "All Apps Are Up to Date".
 * Double tapping (the standard gesture for zooming) didn't work in prior firmware versions in the Mail application. The only way to zoom into content (e.g. a HTML attachment/web page) was to use the 'pinch' method. 2.1 now adds the functionality of double tapping to zoom in the Mail application.
 * Calculator bug fixed affecting calculations involving Pi.


 * OS Enhancements
 * Triple-click on the control button of headphones now jumps music to previous track played.
 * SMS app can alert up to two additional times if you don’t acknowledge an incoming text message. (will play the alert sound/vibrate again after a period of time as if a new message just came in).
 * When receiving a text message, it used to display "Sender — Text Message" when the message preview was off, e.g. "Pete — Text Message". After updating to 2.1, it now just displays "New Text Message".
 * Update Supporting Languages
 * Option to wipe data after ten failed passcode attempts. (After 5 attempts, the device will disable itself for 1 minute. After the 6th attempt, it will disable itself for 5 minutes. In the 10th attempt, it will wipe all data.)
 * 3G, EDGE, and GPRS indicators changed.
 * The camera can now be turned off within the restrictions page.
 * When taking a screen-shot of your phone, there is now the camera shutter noise
 * Pause apps by clicking the icon while it downloads/installs
 * Updated apps now keep their original position in the Home Screen.
 * iPod volume/application volume setting is now independent of the phone ringer volume setting.
 * iPhone never gets locked when placed in dock and play music.


 * New Application features
 * Genius playlist creation
 * More information provided within iPod Music lists (artist and album are now shown below song title when selecting music in addition to remaining time on podcasts)
 * More information is provided for audiobooks, such as displaying time left in active audiobook.
 * New podcasts & videos had "filled" blue bubbles next to them to indicate that they were new, but with 2.1, if you have "half-played" a podcast or video, it will include a half filled blue bubble.
 * Sound from iPod now "fade out" if you start syncing device with iTunes.
 * Options to load & display earlier text message in a conversation.
 * EXIF data information now remains on photos/pictures when emailed from your iPhone. Sites such as Flickr are now able to show geotag and other information.
 * When location services is switched off in the Settings menu, the Maps application reminds you to manually turn it back on from the Settings menu when using GPS. Originally, you would have the option to turn it on when the notification appeared.
 * Bookmarked home screen apps open in full screen.


 * Only available in the iPod Touch
 * Settings for individual speaker sounds. Sounds can no longer be turned off en masse. All sounds must be turned off individually to mute sounds.
 * New speaker sound when sending mail.


 * Only available in the iPod Touch 2G
 * Nike+ Support

! style="white-space:nowrap;"|

2.2

 * style="white-space: nowrap;" | 5G77,,

5G77a
 * 04.05.04_G

02.28.00
 * November 21, 2008
 * Free Update for 1st Gen. iPod Touch owners that upgraded to iOS 2.0.
 * Enhancements to Maps (iPhone Only).
 * Google Street View
 * Public transit and walking directions
 * Display address of dropped pins
 * Share location via email
 * Cache of recent locations
 * Cache of recent locations


 * Enhancements to Mail
 * Resolve isolated issues with scheduled fetching of email
 * Improved formatting of wide HTML email


 * App Store changes
 * "Categories" section has been altered to display icons instead of a list.
 * Individual applications pages now have 'Tell A Friend' and 'Report A Problem' buttons.
 * In an app's description, multiple screen shots can now be viewed, instead of just one.
 * "Update All" button added to "Updates" section.
 * Option added to rate an application that is about to be deleted.
 * Improved touch response when purchasing or downloading an application.
 * Application icons display the install progress "in place" while updating, rather than on the last position of the page.


 * Safari Enhancements
 * Improved stability and performance of Safari
 * Layout changes for the address bar in Safari


 * iPod Player changes
 * The edit/clear icons on the on-the-go playlist have been changed.
 * Podcasts now are being shown in catalogs.
 * You can not delete audiobooks anymore through the device.
 * Audiobooks without artwork, are now shown with a book icon and not with a note icon.


 * Contacts Improvements
 * US phone numbers now display correctly e.g. 1111 2222 (In 2.1, this would have been shown as 1 111222 2).


 * Other Enhancements
 * Podcasts are now available for download or stream in the iTunes application (over Wi-Fi and cellular networks)
 * Decrease in call set-up failures and call drops
 * Improved sound quality of visual voicemail messages
 * Visual voicemail unavailability is shown in a screen instead of voicemail button not working
 * Improved performance overall, especially noticeable in Notes and Camera applications.
 * Emoji for SoftBank users in Japan.
 * Can be enabled in all other countries using apps from the App Store.
 * Pressing the Home button from any Home screen takes you to the first Home screen.
 * Preference to turn on/off keyboard auto-correction
 * New languages are supported.
 * Shows Update/Restore progress when update using iTunes
 * Security improvement
 * Developers can pipe video out to an external device.
 * Better shift-key behavior
 * Automatic WebClip icon change
 * Locked screen screenshots
 * Ability to record from devices connected through the dock port
 * Some minor bugfixes and improvements.
 * Picker sounds are now controlled by the keyboard sound settings


 * Macworld OTA updates
 * iTunes now works over EDGE and 3G networks and no longer requires a Wi-Fi network


 * iPod Touch 2G Only
 * Line-in audio has been enabled through the headphone jack.
 * Add the Remote button to control other devices (Like Apple TV, ...) on the Nike + iPod menu.

! ; white-space: nowrap;"|

2.2.1

 * style="white-space: nowrap;" | 5H11,,

5H11a

9M2621a
 * 04.05.04_G

02.30.03
 * January 27, 2009
 * Improved general stability of Safari
 * Fixed issue where some images saved from Mail do not display correctly in the Camera Roll
 * Updates Baseband
 * iPod Touch Only
 * Fixed issue that caused some Apple Lossless (ALAC) audio files to skip during playback
 * Fixed issue that caused some Apple Lossless (ALAC) audio files to skip during playback


 * iTunes 8.1
 * Fixes calendar color syncing issue (Mac Only)

! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features
 * Uses a new baseband which patches the exploit previously used to unlock the iPhone 3G.
 * - class="sortbottom"
 * }

3.x: Third major release of the OS
3.0 became available with the iPhone 3GS. It was released on June 17, 2009. This release added much requested features such as copy and paste, and MMS. Not all features were available on the original iPhone. Devices running 2.x were upgradeable to this firmware.

{| class="wikitable" style="width:100%; font-size:90%;" ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features ! style="white-space:nowrap;"|

3.0

 * nowrap;| 7A341
 * style=" | 04.05.04_G

04.26.08,
 * style=" | June 17, 2009
 * Initial release on iPhone 3GS
 * Paid upgrade for iPod Touch users
 * Cut, Copy, Paste added
 * Tap and hold for select/select all menu (Copy menu in photos)
 * Double tap for Cut/Copy/Paste menu all over iOS (sms to email to notes...)
 * Two point dragable selection handles displayed to better make a selection
 * Undo by shaking
 * In photos options menu select the copy button to select multiple photos to copy
 * In photos options menu select the copy button to select multiple photos to copy


 * More/System/Navigation
 * turn-by-turn navigation
 * Lithium-ion polymer battery usage up to 5% better
 * A-GPS accuracy improved (+5% better)
 * Earth magnetic compass support
 * Compass App


 * Maps
 * Features that iPhone users got in 2.2 have been added for the iPod Touch (such as Google Street View, Public transit and walking directions, Display address of dropped pin, Share location via email, and Cache of recent locations.) Changed behavior when routing directions and showing steps.


 * YouTube
 * Can now log into account
 * View subscriptions, Favorites, My Videos, History, and Playlists
 * Comment on videos, Rate videos


 * Phone
 * Recent Calls now shows more details (call length, etc.)
 * Ability to change/set "own number" (my number) in the SIM Card. Will be displayed in the Contacts list and iTunes, as well as possibly used for MMS identification
 * Contacts are editable via Recent Calls


 * Camera and Photos
 * Video Recording in Camera app
 * Videos can be trimmed directly from Camera app
 * Camera now has a thumbnail of the previous photo captured. The thumbnail also acts as a shortcut to "Camera Roll" allowing for view/delete of photos without exiting the camera app
 * Camera now has autofocus. To change what is being focused on, simply tap on what you wish to now have the camera focus. (iPhone 3GS only)
 * Photos options menu changed (New UI, added copy button)
 * Can now delete multiple photos


 * App Store
 * Installs new apps from the second home page on. You can still move the apps to the first home page manually
 * Screenshot browsing method has changed


 * SMS application renamed to Messages
 * Application icon was slightly modified, it no longer has the letters "SMS"
 * Sending progress bar has been moved to the title bar and does not cover up the screen
 * Sending queue (compose a new message(s) while sending others)
 * Select single or multiple messages to forward or delete
 * SMS entry text box have unlimited lines (Actually limited by the screen)
 * MMS functionality including sending vCards, pictures, audio files, video (dependent on mobile network availability),
 * Optional Subject line in the Messages settings
 * Photos can be taken/sent directly from the Messages app
 * MMS messages are played/viewed in the Messages app


 * Mail, Contacts, Calendars, MobileMe
 * MobileMe now has a "Find My iPhone" option, allowing MobileMe users (via the online service) to remotely locate device and wipe data
 * CalDAV Calendar support
 * LDAP Contacts support
 * iCalendar Subscription support
 * “Load Remote Image” option for mail, to prevent spam
 * iWork '09 attachment support
 * Mail several photos in the same message
 * Mail can now be composed in other apps without leaving the current app (only if the developer allows this)
 * It's now possible to store IM account information for a contact for the following services: AIM, Yahoo, MSN, ICQ, and XMPP.
 * Users can now view or create 'Invitees' on a Calendar event


 * Safari
 * Better support for Internet standards and now scores a 97/100 in the Acid3 test.
 * Renders JavaScript from 3 to 16 times faster depending on circumstances.
 * Support for HTML5.
 * New features in Settings such as AutoFill, and Anti phishing
 * Pressing and holding a link gives three options: Open, Open in New Page and Copy.
 * View subscriptions
 * The last page is now closable, which will result in a new blank page opening (Won't save page info on exit, increases available memory)


 * Bluetooth
 * Bluetooth enabled for iPod Touch 2G
 * A2DP: stereo audio,,,
 * AVRCP: Play/Pause/Stop for iPod app (no Next/Back yet)
 * Device side audio control still enabled but does not effect audio stream
 * PBAP: wireless phone book access (for use with vehicle head units)
 * PAN: personal networking for tethering and ad-hoc connections between mobile devices (multi-player gaming)


 * iPod
 * Shake to shuffle songs in iPod app
 * Search through iPod
 * Scrubbing through tracks can now be done at 4 variable rates as user moves finger down the screen, and the speed is displayed on screen ("Hi-Speed", "Half Speed", "Quarter Speed", "Fine")
 * (When Bluetooth is enabled and a paired audio device is present) Audio output menu added to "Now Playing" screen and Home button iPod controls
 * Location dot while playing video/music now glows while you scrub the track/video
 * Podcasts
 * More details shown: time remaining, etc.
 * Can be played at "½x", 1x, or "2x" speed (actual speeds are 0.8x, 1x, and 1.5x)
 * 30 second rewind button
 * Can be emailed


 * Improved language support.
 * Added new language support such as Arabic, Greek, Hebrew, Indonesian, Malay, Portuguese, Romanian, Thai and more
 * Foreign language keyboards extended to cover additional characters


 * New Developer APIs
 * Push notifications for 3rd party applications
 * Bluetooth services including A2DP, LDAP, P2P file sharing, and Bonjour,,,
 * New APIs in the Maps application allow developers to build it in to software
 * Developers can now use CoreLocation to make Turn by Turn applications
 * API support for serial I/O through the Dock Connector
 * 3rd party apps now have access to iPod music library
 * Support for outbound audio and video streaming
 * In-app additional payment API for paid applications (free apps always remain free)
 * Sign in with iTunes account
 * Buy service subscriptions or app add-ons


 * Spotlight Search
 * Saves its last search results and offers options for excluding applications from searches.
 * Partial search for mail, iPod, contacts, events, notes, apps, and web clips


 * iTunes/Sync
 * iTunes version 8.2
 * iTunes account creation on device
 * Can now sign out of iTunes account and use a different iTunes account
 * iTunes account info can be accessed and edited
 * Can now read and write reviews for content on iTunes
 * Movies, TV shows, audiobooks, and iTunes U content can now be purchased on iTunes Wi-Fi store
 * Notes syncing
 * Voice memos syncing (audio files added to a "Voice Memos" playlist)
 * Backups can now be encrypted and password protected


 * Tethering over USB and Bluetooth (dependent on mobile network capability),
 * USB tethering auto activated when connected to USB on iTunes 8.2+ (if tethering is enabled in iPhone settings and by phone's carrier)
 * iTunes 8.2 now includes a USB driver for iPhone tethering
 * Full access to iPhone possible while tethered
 * (In Windows) iPhone shows up as a standard ethernet connection


 * Accessibility settings (for the visually/aurally impaired) (iPhone 3GS only)
 * VoiceOver gesture-based screen reader. Touch screen to hear a description of the item under your finger, then double-tap, drag, or flick to control iPhone. Speaks 21 languages and works with all apps
 * Zoom, magnifies entire screen on any app up to 5 times normal size. Move left, right, up, and down to view any portion of the screen close-up
 * White on Black, changes display to white on black (instead of the normal black on white), works in any app, and alongside with Zoom and VoiceOver
 * Mono Audio, if users hearing is limited in one ear, routes both right- and left-channel audio into both earbuds, so you can hear both channels in either ear
 * Speak Auto-text, works with VoiceOver to automatically speak auto-corrections and auto-capitalizations


 * Other
 * Device automatically connects and authenticates to Wi-Fi hotspots which require username and password (e.g. Starbucks, McDonalds)
 * Locate Me for the iPod Touch accuracy improved.
 * Restrictions have been updated and now block “Current Location” and allows setting what content is appropriate for iPod music/videos/TV shows and apps.
 * 11 home screen pages instead of 9. Now can store 180 apps. (Including native applications. i.e. Phone, iPod, Safari)
 * Speed optimizations during keyboard input and use of the included App Store application.
 * New Voice Memo Application
 * Voice memos can be trimmed directly from app
 * Voice Control ,
 * Nike+ Support,,
 * Stopwatch now shows both the total running time and the current lap time in the upper part of the clock app
 * Landscape on Messages (SMS), Mail, Stocks, Contacts, and Notes
 * Right to Left support
 * Numeric battery percentage view
 * Holding the home button will no longer force quit an unresponsive application. To force quit an application in 3.0 hold the sleep/wake button until the red power off slider appears. Then hold down the home button to quit the unresponsive application.
 * Screen captures are no longer numbered separately from photos taken with the camera application; all new images in the camera roll now use a common numbering sequence.

! style="white-space:nowrap;"|

3.0.1

 * 7A400
 * 04.05.04_G

04.26.08, ! style="white-space:nowrap;"|
 * July 31, 2009
 * Fixes SMS vulnerability
 * Bug Fixes
 * Bug Fixes

3.1

 * style="white-space: nowrap;" | 7C144,,

7C145,,

7C146
 * 04.05.04_G

05.11.07,
 * September 9, 2009
 * Initial release on iPod Touch 2nd Generation (8GB MC Model)
 * Initial release on iPod Touch 3rd Generation
 * Version 3.1.1 on iPod Touch (all models)
 * Free Update for iPod Touch (all models) owners that upgraded to iOS 3.0
 * Free Update for all iPhone owners
 * $4.95 for other iPod Touch users
 * Improved Wi-Fi for iPhone 3G with Bluetooth turned on
 * Ask to Join Networks toggle is hidden unless Wi-Fi is on
 * Faster boot up time and various speed improvements
 * Trimming video clips on the iPhone 3GS now offers the ability to save the edited version as a copy rather than simply overwriting the original file
 * Safari now has a toggle for "Fraud Protection" under its Settings pane
 * Bulgarian keyboard is in the Bulgarian State/National Standard layout, not QWERTY layout
 * On iPod Touch 2G the Voice Memos app now successfully records audio if you plug your microphone after you have started the application
 * Numbers inside Notes have more options when tap and hold is triggered: Call, Text Message, Create New Contact, Add to Existing Contact
 * Voice Control over Bluetooth is now available, allowing users to Initiate calls and control music playback via Bluetooth headsets (however, voice control while plugged in to car audio systems no longer works)
 * Improves reception
 * Fast forward & rewind from headphones
 * Improved Exchange calendar syncing
 * Home screens can be customized on iTunes 9
 * Developer Extras
 * Improvements to OpenGL and Quartz
 * APIs allow third party apps to access videos and edit them
 * Gives programmers their choice of video recording quality
 * A pair of new app interface classes that are known to relate to graphics, but which haven't had their functions identified
 * A pair of new app interface classes that are known to relate to graphics, but which haven't had their functions identified


 * New camera APIs
 * Calendar event alerts will be shown also with a pop-up, much like push notifications
 * Xcode 3.1.3 has also been released and is said by people aware of the update to improve facilities for creating a new project as well as setting a target configuration.


 * Enables connectivity to devices for developmental purposes wirelessly instead of requiring tethering via the dock connector
 * Ability to save videos from Mail or MMS
 * Ability to copy and paste full quality videos from camera into email
 * Anti-Phishing in Safari
 * Under usage tab in settings able to view data sent and received over tethering
 * Instruments over Wi-Fi
 * New Enhancements to Core Audio in iPhone
 * Failover support for HTTP live streaming
 * Added for iPod Touch 3rd Generation (Only the 32/64GB editions)
 * Voice Control
 * Added accessibility features from iPhone 3GS, including VoiceOver

! style=" white-space:nowrap;"|
 * Accessibility features can be toggled on or off by triple-clicking the home button
 * Option to practice VoiceOver gestures
 * Fixed an issue that caused app icons to display incorrectly
 * Genius mixes
 * Genius Recommendations for Apps
 * Sync videos to albums
 * iTunes U content organization
 * Redeem Gift Cards in App Store
 * Display available iTunes account credit
 * Enhanced iTunes support
 * Ability to copy and paste telephone numbers in dialer application
 * Sponsored links in Maps
 * Direct copy of contact info
 * Bug fixes
 * Security improvements
 * Now fully supports device encryption for Exchange
 * Uses a new baseband which patches the exploit previously used to unlock the iPhone 3G/3GS.
 * Adds separate usage metering for tethering data

3.1.2
,,
 * 7D11,, ,
 * 04.05.04_G

05.11.07, ! style="white-space:nowrap;background:#9C0;" |
 * October 8, 2009
 * Attempt to resolve sporadic issue that may cause iPhone/ iPod touch to not wake from sleep.
 * Resolves intermittent issue that may interrupt cellular network services until restart
 * Fixes bug that could cause occasional crash during video streaming
 * Fixes bug that could cause occasional crash during video streaming

3.1.3
,, 05.12.01, Final release supported on first generation devices (Original iPhone and iPod Touch)
 * 7E18,, ,
 * 04.05.04_G
 * February 2, 2010
 * Improves accuracy of reported battery level on iPhone 3GS
 * Resolves issue where third-party apps would not launch in some instances
 * Fixes bug that may cause an app to crash when using the Japanese Kana keyboard
 * Fixes security bugs in CoreAudio, ImageIO, Recovery Mode and WebKit
 * Uses a new baseband which patches the exploit previously used by blacksn0w to unlock the iPhone 3G/3GS.
 * In Cydia, there are apps which allow the downgrading of the iPhone 3G baseband to work with unlocks, only if the phone has the old baseband bootloader 5.8.

! style="white-space:nowrap;"|
 * Updates WebKit to 528.18
 * colspan=5 align=center | iPad Only
 * colspan=5 align=center | iPad Only

3.2
iPad only ! style="white-space:nowrap;"|
 * 7B367,
 * 06.15.00
 * April 3, 2010
 * Initial support for iPad
 * Initial support for landscape home screens
 * Includes new frameworks for recognizing custom gestures, custom keyboards etc.
 * Allows display output to an externally connected display for compatible 3rd party apps
 * Allows user to change home screen background
 * Adds Terrain view in Maps application
 * Location-based services rely on Apple's own databases instead services of Google and Skyhook Wireless.
 * Allows transferring files between a computer and the device for a shared (per app) document store that all applications can access. Only available for the iPad.
 * Allows use of Apple Bluetooth keyboard (possibly other keyboards)
 * Includes a built in dictionary which can be used in iWork and iBooks (possibly other apps too)
 * The Dock is now able to hold up to six icons
 * The iPod App allows the user to create and name custom playlists
 * Safari's new Thumbnail View allows the user to navigate to up to nine active pages (similar to Top Sites on Safari for Mac OS X)
 * Places in the Photos App allows the user to view their photos by location (requires iPhoto '09)
 * 720p HD videos are available in the YouTube App
 * Share YouTube videos to Facebook
 * iBooks

3.2.1
iPad only !
 * 7B405,
 * 06.15.00
 * July 15, 2010
 * Better WiFi-Connection
 * BugFix in Mail so it does not crash any more when doing copy-and-paste from a one-page-PDF
 * BugFix in Video playback so that videos no longer freeze in certain situations
 * Better reliability when using the iPad Dock Adapter to VGA
 * Added Search Engine Bing
 * WebKit version 531.21.10

3.2.2
iPad only ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features
 * 7B500,
 * 06.15.00
 * August 11, 2010
 * Fixed a security vulnerability in FreeType that allowed malicious code to be executed in Safari.
 * Fixed a security vulnerability in the IOSurface private framework that allowed privilege escalation.
 * - class="sortbottom"
 * }

4.x: Fourth major release of the OS
iOS 4 was made available to the public for the iPhone and iPod Touch on June 21, 2010. This is the first major iOS release to drop support for some devices.

The iPhone 3G and iPod Touch 2nd. Gen. have limited features, while the iPhone 4, iPhone 3GS, iPod Touch 3rd. Gen. & iPod Touch 4th. Gen. have all features enabled.

iPad compatibility was added with the release of iOS 4.2.1 on November 22, 2010.

{| class="wikitable" style="width:100%; font-size:90%;" ! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features ! white-space:nowrap;"|
 * colspan=5 align=center | iPhone and iPod Touch (2nd generation and higher) Only
 * colspan=5 align=center | iPhone and iPod Touch (2nd generation and higher) Only

4.0
01.59.00 iPhone and iPod touch only (2nd generation or higher)
 * 8A293, , , ,
 * 05.13.04 ,
 * 2010-06-21


 * Initial release on iPhone 4
 * Limited support on iPhone 3G and iPod Touch 2G


 * Multitasking,,
 * User interface for app switching by double clicking home button
 * Portrait orientation lock,,
 * iPod control widget


 * Facetime direct video calling ability over WiFi (iPhone 4 only)
 * iBooks sync support through iTunes for iPhone and iPod Touch
 * iAd mobile advertising network


 * Settings
 * App-specific location settings
 * Cellular data toggle (On/Off)
 * "Complex Password" setting: passwords with alphabet characters and numbers
 * Simple Passcode Lock (4 digit number) option
 * New Wallpapers
 * Wallpaper available for home screen,,
 * New Wallpaper preview for home screen and lock screen
 * Set up Internet Tethering
 * New Gmail and Exchange icons in Mail, Contacts, Calendars account settings
 * Support multiple Exchange accounts
 * Custom Dictionary
 * Airplane Mode for iPod touch
 * Separated Sounds settings from General settings


 * Home Screen
 * Ability to categorize apps into folders with default folder naming based on category name in App Store
 * Up to 2,160 instead of 180 visible apps (12 apps per folder)
 * Folder name supports up to 13 characters
 * Custom Home screen wallpaper
 * Increased screen resolution
 * Dock redesigned to that of the iPad
 * Rate on deleting app removed
 * Default utilities folder which contains the clock, calculator, voice memos and compass apps
 * Revised SpringBoard scrolling


 * Camera
 * Up to 5x digital (as opposed to optical) zoom feature on the camera app


 * Photos
 * Categorized by Albums, Faces, Events and Places (under iPhoto in Mac OS X)
 * Select multiple photos for mass deletion
 * Support landscape mode


 * Camera Roll
 * Categorization by All, Photos and Videos
 * Support landscape mode


 * App Store
 * Ability to gift apps


 * Maps
 * Unified "locate me" icon
 * Background location icon shown on status bar


 * iPod
 * Playlist creation on device
 * Nested playlists
 * Lyrics and Podcast info on Setting
 * Volume control with Bluetooth headsets
 * Art in Album View


 * Notes
 * Notes syncing with MobileMe, Gmail IMAP and Yahoo! Mail
 * Accounts management appears if Syncing is enabled
 * Notes setting below Mail, Contacts, Calendars Settings if syncing is enabled
 * Moved search box into title bar


 * Calendar
 * Birthday calendar
 * CalDAV invitations
 * Ability to edit which calendar an event is located in after the initial saving
 * Ability to select any combination of calendar categories to view


 * Contacts
 * Unified Info by linking contacts from different accounts
 * CardDAV
 * Streamlined "New Contact" Screen


 * Spotlight
 * Search with Web or Wikipedia
 * Search Messages


 * Safari (Webkit version 532.9)
 * Bing is now a search option, along with Google and Yahoo
 * Recent Searches below search field
 * Top Hit in Search
 * Suggestions appear below search field for all 3 Search Engines
 * Unified "Search" keyboard button when search field being used
 * In-Page Audio Playback


 * Voice Control
 * The ability to ask what the current time is,,


 * YouTube
 * Rotate & Zoom Videos in vertical and horizontal Position
 * Latest 480pp for smoother and quicker video playback


 * Accessibility
 * Larger fonts in Mail, SMS & alerts,,
 * Automatically speak auto-corrections and auto-capitalizations


 * Message
 * Include a Search bar
 * Character count (Can be enabled or disabled in Settings -> Messages screen)
 * Failed SMS Notification
 * Option to toggle off the ability to send group messages


 * Mail
 * Unified Inboxes
 * Edit from Outbox
 * Support for multiple Exchange accounts
 * File & delete Mail search results
 * Organize By Thread in Mail
 * Quicklook attachments
 * Open attachments by registered filetype with corresponding Apps from App Store
 * Smart Links For Dates and Addresses
 * Contact Pictures in Emails
 * Create Calendar events from dates within emails


 * International
 * Spell Check
 * Added Cangjie and Wubihua Keyboards for Simplified and Traditional Chinese
 * Text replacement between Simplified and Traditional Chinese
 * Switch keyboard shortcut (holding the "earth" button on keyboard for a while)
 * Added support for Danish voice control
 * New Language added (Catalan, Hungarian, Vietnamese)
 * Fixed Tamil Language Font
 * Added AZERTY and QWERTZ keyboard layouts, beside QWERTY
 * Improved Devanagari Font
 * Changed to Sans-Serif Font
 * 'Aw' character (ॉ) still does not render properly


 * Other
 * Support for Apple Bluetooth keyboards,,
 * Persistent Wi-Fi
 * Added support for iBooks application
 * Wake on Wireless
 * Auto-join and Auto-login and IPv6 on individual Wi-Fi Networks setting
 * Enhanced data protection,,
 * Wireless app distribution
 * Mobile device management
 * SSL VPN support (both Juniper and Cisco)
 * Microsoft Exchange Server 2010 support
 * Improved Bluetooth driver for A2DP devices
 * Improved iOS animations

! style="white-space:nowrap;"|
 * Note: iPod Touch 1st gen and Original iPhone devices are not supported, while iPhone 3G and iPod touch 2nd gen have limited support. iPhone 4, iPhone 3GS, and iPod touch 3rd gen are all fully supported.

4.0.1
01.59.00 iPhone only
 * 8A306, ,
 * 05.13.04 ,
 * 2010-07-15
 * Updated Carrier Signal Strength Display
 * Increase in the length of the smaller signal bars
 * The method in which signal strength is calculated has been enhanced

! style="white-space:nowrap;"|
 * Fixed Exchange ActiveSync issues
 * Only official SIM card number can be used for FaceTime identification

4.0.2
01.59.00 iPhone and iPod Touch only ! style="white-space:nowrap;"|
 * 8A400, , , ,
 * 05.13.04 ,
 * 2010-08-11
 * Fixed a security vulnerability in FreeType that allowed remote code to be executed via Safari.
 * Fixed a security vulnerability in the Io Surface private framework that allowed privilege escalation.

4.1

 * 8B117, , , , ,
 * 05.14.02 ,

02.10.04 iPhone and iPod Touch only
 * 2010-09-08
 * Initial release on iPod Touch (4th Generation)
 * Improved calendar colors
 * Bug Fixes
 * iPhone 4 Proximity Sensor issues (not fixed)
 * Bluetooth connectivity
 * iPhone 3G performance problems under iOS 4.0
 * Nike + iPod fixes and both the retina display
 * Fixes White Balance issue with iPhone 4 under certain lighting conditions.
 * Fixes FaceTime error where iPhone 3G and iPhone 3GS users could enter "facetime://" URLs in Safari.

! style="white-space:nowrap;"|
 * Game Center (Only available for iPod Touch 2nd, 3rd, and 4th generation, iPhone 3GS and iPhone 4) no support for iPhone 3G
 * Updated Carrier Settings (US is AT&T 8.0)
 * Security updates to Accessibility, Facetime, ImageIO and WebKit
 * Improved AVRCP, adds support for Next and Previous
 * Enables FaceTime call connection via email contacts (e.g. for 4th gen iPod Touch users who won't have a phone number) and through favorites
 * Check Spelling can be turned off in Settings
 * P2P App Support
 * Nike + iPod statistics submissions over Wi-Fi
 * Improved Battery life across the board
 * High Dynamic Range Imaging (HDR) (Only available for the iPhone 4)
 * HD video upload over Wi-Fi (Only available for the iPhone 4 and the iPod Touch 4th Generation)
 * iTunes adds Ping, a social music network and discovery tool (Only available in countries with iTunes Music Store)
 * TV Show rentals (Only available for iTunes US Store)
 * Can move an existing appointment from one calendar to another
 * Notes syncing removed from iPhone 3G due to reported performance problems
 * Safari 6531.22.7, Webkit 532.9
 * Restores Field Test mode
 * colspan=5 align=center | iPhone (3G and higher), iPod Touch (2nd generation and higher), and iPad
 * colspan=5 align=center | iPhone (3G and higher), iPod Touch (2nd generation and higher), and iPad

4.2

 * 8C134, , , , ,

8C134b ,
 * 05.15.04 ,

03.10.01 07.10.00 For iPhone, iPod touch, and iPad
 * N/A, replaced by 4.2.1


 * Bug Fixes
 * Birthdays Calendar does not display Birthdays starting more than 77 Years ago


 * AirPlay (replacement of AirTunes, AirPlay will offer stream video, music, and photos over Wi-Fi)
 * AirPrint Wireless Printing with Print Center (select models)
 * Import .ics calendar files directly for events
 * Improved Battery Performance
 * Birthdays icon has been changed in calendar
 * Updated Carrier Settings (US is AT&T 9.0, UK is O2 9.1, Germany is Deutsche_Telekom 9.0)
 * Text search on web pages (not on iPhone 3G or iPod Touch 2G)
 * 2 new fonts for Notes in Settings (Helvetica and Chalkboard)
 * Safari 6533.18.5, WebKit 533.17.9
 * Added support for Chinese URL over Safari
 * Added an indicator in the App Store which shows if an App supports Game Center
 * Support for CoreMIDI
 * YouTube voting
 * Minor improvements in UI graphics
 * New Parental Controls for deleting Apps, changing mail accounts and location services
 * The fontsize of text in Calendar can now be changed in the Accessibility settings
 * Security fixes
 * Network-controlled fast dormancy implemented in baseband to improve battery life and reduce network congestion

iPad only
 * 4.x Support for the iPad
 * iOS 4 features for iPad (Multitasking, Folders, etc.)
 * Updated Carrier Signal Strength Display (3G iPad only)
 * Increase in the length of the smaller signal bars
 * The method in which signal strength is calculated has been enhanced


 * Additions to the multitasking tray
 * Brightness
 * Volume control
 * AirPlay Controls
 * Screen rotation lock switch


 * Physical iPad screen rotation lock switch is converted into a sound/silent switch in iOS 4.2 (Just like on the iPhones), with a virtual screen rotation lock switch added to the multitasking tray.
 * More than 30 new keyboards and dictionaries, including Arabic, Greek, and Hebrew
 * New Multitasking animation
 * New bookmarks design

iPhone and iPod Touch only
 * Bug Fixes
 * Fixes glitch that can let a user get into the phone app while the phone is locked via "Emergency Call" by dialing a random number and quickly pressing the lock button after dialing that call
 * Fixes the alarm bug caused by daylight saving time changing, affected on a part of iPhone and iPod Touch owners living in various countries
 * Improved iPhone 3G and iPod touch 2G performance


 * Additions to multitasking tray
 * Volume controls
 * AirPlay controls


 * New Voice Memos icon
 * Ability to initiate FaceTime calls from Voice Control
 * FaceTime shortcut from Messages app (iPhone 4 only)
 * New Text Tone Alerts (New & Original tone lists) (iPhone 4 only)
 * Ringer & Alerts on/off switch (Settings > Sounds) for volume buttons (iPhone only)
 * Assign different text tone alerts to each contact (iPhone only)
 * Restores full Field Test Mode

! style="white-space:nowrap;background:#9C0;"|

4.2.1

 * 8C148, , , , , ,

8C148a
 * 05.15.04 ,

03.10.01

07.10.00
 * 2010-11-22

Bug Fix Release


 * Intended release of iOS 4.2


 * ''Final release supported on second generation devices (iPhone 3G and iPod Touch 2G)

For iPhone, iPod touch, and iPad

! style="white-space:nowrap;"|
 * Bug Fixes
 * Fixes intermittent Wi-Fi issues from the unreleased iOS 4.2 update
 * Fixes VoIP issues
 * Fixes Car Stereo "music skip" issues
 * New Icon for Voice Memo
 * Find My iPhone location feature is free for (iPhone 4, iPad & 4th Gen iPod Touch) running on iOS 4.2.1 ,,,
 * colspan=5 align=center | CDMA iPhone 4 Only
 * colspan=5 align=center | CDMA iPhone 4 Only

4.2.5

 * 8E128
 * 1.0.05
 * 2011-02-07
 * CDMA Network Support
 * Personal Hotspot feature
 * Note: The release date is Feb. 7 because some Verizon customers received their phone on that day.
 * Note: The release date is Feb. 7 because some Verizon customers received their phone on that day.

! style="white-space:nowrap;background:#9C0;"|

4.2.6

 * 8E200
 * 1.0.05
 * 2011-02-10
 * Personal Hotspot Bug Fixes
 * Personal Hotspot Bug Fixes

! style="white-space:nowrap;background:#A1CAF1;"|
 * colspan=5 align=center | Future versions for GSM iPhone 4, iPhone 3GS and higher, iPod Touch 3rd generation or higher, iPad, and iPad 2
 * colspan=5 align=center | Future versions for GSM iPhone 4, iPhone 3GS and higher, iPod Touch 3rd generation or higher, iPad, and iPad 2

4.3
05.10.01  04.10.01
 * Beta 1 (8F5148b), , , , ,  Beta 2 (8F5153d) , , , , ,   Beta 3 (8F5166b) , , , , ,   Golden Master (8F190) , , , , ,
 * 05.16.00


 * March 11, 2011

For iPhone 3GS & 4(GSM only), iPod touch (3rd generation & Above), iPad and iPad 2


 * Initial release on iPad 2


 * AirPlay video support for third party apps
 * HTTP Live Streaming Statistics
 * New font in Notes app ("Noteworthy")
 * A slightly “redesigned” keyboard with a different graphic under each key in the App Store
 * New UI in the App Store
 * Redesigned “account” section under the Store menu
 * Location services has been shifted from General to Settings Menu
 * New Parental Controls for use with Ping
 * Location services & Mail accounts ON/OFF button changed to a lock symbol
 * New menu for scrubbing in videos
 * Fine Scrubbing: Adjust by seconds/ frames
 * Quarter Scrubbing: Second
 * Half Speed Scrubbing: Adjust by minute(s)
 * Hi-Speed Scrubbing: Run fast through minutes


 * Ability to cancel and delete an app which is currently downloading. Before iOS 4.3 it was only possible to delete an app which has already downloaded.
 * Stream from an iTunes library to iOS using Home Sharing.

iPhone only
 * Personal Hotspot feature (Wi-Fi Tethering with up to 3 simultaneous devices (Wi-Fi Tethering iPhone 4 Only)) on supported carriers.
 * Ability to set amount of times a text tone repeats (up to 10 times)
 * In Field Test Mode refresh button has been removed & Updated information has been displayed in bottom of the screen (it updates every 4-6 seconds)
 * Slideshow options moved to Photos app
 * New look for taking a picture for a Contact
 * When receiving a text message, the iPhone now vibrates 2 times

iPod Touch only
 * New FaceTime icon (4th Gen iPod Touch Only )
 * Added FaceTime Command in Voice Control (3rd Gen & Above iPod Touch Only )
 * New look for taking a picture for a Contact (3rd Gen & Above iPod Touch Only )

iPad and iPad 2 only
 * Initial Release on iPad 2nd Generation
 * New four & five-finger multi-touch gestures (Only Available in beta versions of the iOS 4.3 and can only be activated by using Xcode.))
 * Pinch to take users to the home screen
 * Swipe up for multitasking tray
 * Swipe left and right to switch apps


 * Ability to choose function of iPads physical switch between rotation lock or mute
 * Fullscreen iAd banner format
 * Photobooth & FaceTime app (2nd Generation Only)

Bug Fixes (From official Apple Changelog)
 * Accessibility
 * Fixed issue that prevented controls from being dismissed in some cases
 * Addressed issue where the keyboard could not be brought back when highlighting and swiping through search results
 * Voice over now reads the entire chart in stocks app while in landscape mode


 * AirPlay
 * Fixed slideshow stop after 15 image when using AirPlay


 * Baseband & Telephony
 * iPhone -> 05.16.00 (for 3Gs), 04.10.01 (for 4)
 * Enabled Traffic Volume Indicator IE in CELL UPDATE
 * Fixed issue with integrity protection failing after SRNS relocation
 * Fixed issue of iPhone units deactivating and not activating after baseband logging is enabled
 * iPad ->  07.11.00
 * Fixed issue of Physical channel reconfiguration failure during a reselection procedure
 * Fixed issue of the UE missing a page because it is decoding and responding to RRC Setup messages meant for other UEs
 * Fixed incorrect auto routing with LG HBM-210 on FaceTime calls


 * CalDAV
 * Fixed canceled recurring calendar events still shows on the event list


 * Calendar
 * Fixed deleting a recurring events make the alarm go away
 * Fixed all-day alarm fired an hour early


 * Exchange
 * Fixed exchange calendar event duplicating when passing Israeli daylight savings time


 * Fonts
 * Letter ł is now visible in notes


 * Keyboard
 * Fixed missing accented letters in European keyboard popups
 * Increase font size for China and Pinyin inputs
 * Fixed auto-correction issue when switch back from Emoji to English keyboard
 * Added inline space with Pinyin inputs
 * Corrected “Undo” translation in Simplified Chinese to “撤销”


 * Localization
 * Updated inconsistent translation in Chinese, Finnish, Norwegian, Korean, Dutch, Polish, Portuguese
 * Fixed missing Chinese characters in Pinyin
 * Improved common phrases used in Chinese
 * Improved common phrases used in Japanese
 * 劲歌金曲 is no longer missing
 * Fixed issue that produced unexpected output when trying to type 从前门进入果
 * 一点儿 now ranked higher than 一点二
 * Word completion candidates capability now available for Chinese language
 * Added additional common phrases for character 耍
 * Fixed issue that caused the wrong candidates to be displayed (J: “間スコット”) when “ますこっと” is input
 * “軽さ(かるさ)” now in the candidate


 * Mail
 * Fixed orientation of mail application not following device orientation under specific conditions
 * Fixed popover when drilling into a thread while the empty search field is focused
 * Fixed mail message view and orientation when quickly selecting a message and hitting edit mode


 * Messaging
 * Fixed MMS messages with vCards scrolling up


 * Phone
 * Fixed screen not drawing properly when Nike+ is in the background


 * Status bar
 * Added new icon for Wi-Fi Tethering for personal hotspot on status bar


 * Web
 * Fixed issue that caused Safari and other apps to crash after loading certain heavy Websites
 * Fixed Personal Hotspot password failure with 22+ characters


 * VoiceOver
 * Added support for “find” in Safari
 * Fixed wallpaper titles for VoiceOver

! style="background:#e9e9e9; width:8em; text-align:center;"|Version ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Baseband ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features
 * - class="sortbottom"
 * }

Version history: Apple TV
{| class="wikitable" style="width:100%; font-size:90%;" ! style="background:#e9e9e9; width:8em; text-align:center;"|iOS version ! style="background:#e9e9e9; width:8em; text-align:center;"|Apple TV software ! style="background:#e9e9e9; width:8em; text-align:center;"|Build ! style="background:#e9e9e9; width:8em; text-align:center;"|Release date ! style="background:#e9e9e9; text-align:center;"|Features !

4.1

 * 4.0
 * style="white-space: nowrap;" | iOS: 8M89

!
 * 2010-09-01
 * Initial release on second generation Apple TV
 * Initial release on second generation Apple TV

4.2

 * 4.1
 * style="white-space: nowrap;" | iOS: 8C150

! style="white-space:nowrap;background:#9C0;"|
 * 2010-11-22
 * AirPlay support
 * VoiceOver in menus
 * Bug Fixes
 * Bug Fixes

4.2.1

 * 4.2.1
 * style="white-space: nowrap;" | iOS: 8C154

Bug Fix Release ! style="white-space:nowrap;background:#9CF;"|
 * 2010-12-14
 * Addresses an issue that causes some high-definition TVs to incorrectly display at 480p.
 * Addresses an issue that may cause a movie or TV show to be re-downloaded.
 * colspan=5 align=center | Future versions
 * -February 14
 * -February 14

4.3

 * style="white-space: nowrap;" | iOS: GM 1 (8F5148c), GM 2 (8F5153d), GM 3 (8F5166b)
 * March 11, 2011
 * AirPlay video support for third party apps on iDevices
 * }
 * AirPlay video support for third party apps on iDevices
 * }


 * Original iPhone
 * iPhone 3G
 * iPhone 3GS
 * iPhone 4
 * iPod Touch (1st generation)
 * iPod Touch (2nd generation)
 * iPod Touch (3rd generation)
 * iPod Touch (4th generation)
 * iPad Wi-Fi
 * iPad Wi-Fi + 3G
 * iPad 2 Wi-Fi
 * iPad 2 Wi-Fi + 3G
 * Apple TV (2nd generation)