iOS 4 is Available, List of Features

AppleiOS 4 is now available in iTunes. You must upgrade iTunes to 9.2 to sync with iOS 4.

This update is for the iPhone 3G, iPhone 3GS & newer iPod touches (not 1st Gen). Some older devices will not get all updates such as backgrounding. See details below.

Here’s a list of apps that support running in the background.

This update contains over 100 new features, including the following:

• Multitasking support for third-party apps*
– Multitasking user interface to quickly move between
– Support for audio apps to play in the background
– VoIP apps can receive and maintain calls in the
background or when device is asleep
– Apps can monitor location and take action while
running in the background
– Alerts and messages can be pushed to apps using
push and local notifications
– Apps can complete tasks in the background
• Folders to better organize and access apps
• Home screen Wallpaper*
• Mail improvements
– Unified inbox to view emails from all accounts in one
– Fast inbox switching to quickly switch between
different email accounts
– Threaded messages to view multiple emails from the
same conversation
– Attachments can be opened with compatible third-
party apps
– Search results can now be filed or deleted
– Option to select size of photo attachments
– Messages in the Outbox can be edited or deleted
• Support for iBooks and iBookstore (available from the
App Store)
• Photo and Camera improvements
– 5x digital zoom when taking a photo**
– Tap to focus during video recording**
– Ability to sync Faces from iPhoto
– Geo-tagged photos appear on a map in Photos
• Ability to create and edit playlists on device
• Calendar invitations can be sent and accepted wirelessly
with supported CalDAV servers
• Support for MobileMe calendar sharing
• Suggestions and recent searches appear during a web
• Searchable SMS/MMS messages**
• Spotlight search can be continued on web and Wikipedia
• Enhanced location privacy
– New Location Services icon in the status bar
– Indication of which apps have requested your location
in the last 24 hours
– Location Services can be toggled on or off for
individual apps
• Automatic spellcheck
• Support for Bluetooth keyboards*
• iPod out to navigate music, podcasts and audiobooks
through an iPod interface with compatible cars
• Support for iTunes gifting of apps
• Wireless notes syncing with IMAP-based mail accounts
• Persistent WiFi connection to receive push notifications*
• New setting for turning on/off cellular data only**
• Option to display the character count while composing
new SMS/MMS**
• Visual Voicemail messages can be kept locally even if
they have been deleted from the server**
• Control to lock portrait orientation*
• Audio playback controls for iPod and third-party audio
• New languages, dictionaries and keyboards
• Accessibility enhancements*
• Bluetooth improvements
• Better data protection using the device passcode as an
encryption key* (Requires full restore.)
• Support for third-party Mobile Device Management
• Enables wireless distribution of enterprise applications
• Exchange Server 2010 compatibility
• Support for multiple Exchange ActiveSync accounts
• Support for Juniper Junos Pulse and Cisco AnyConnect
SSL VPN apps (available from the App Store)
• More than 1,500 new developer APIs
• Bug fixes

Products compatible with this software update:
• iPhone 3G
• iPhone 3GS
• iPhone 4
• iPod touch 2nd generation
• iPod touch 3rd generation (late 2009 models with 32GB
or 64GB)

* Requires iPhone 3GS, iPhone 4, and iPod touch 3rd generation.
** Requires iPhone 3G, iPhone 3GS, and iPhone 4. SMS/MMS messaging and Visual Voicemail require support from your wireless carrier.

For feature descriptions and complete instructions, see the user guides for iPhone and iPod touch at:

For more information about iPhone and iPod touch, go to:

To troubleshoot your iPhone or iPod touch, or to view additional support information go to:

For information on the security content of this update, please visit this website:

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  1. Are any dev’s working on bringing iOS 4 to iPhone 2g? It’s obviously not a hardware issue, as the hardware is virtually identical to the 3g, its just Jobs wanting my money…. But my 2g works wonders still and I want iOS 4 (primarily for iBooks)

  2. I have a question I have never had to deal with before. I have a 3gs and want to upgrade to 4. The problem is that my phone is synced with my MacBook pro. The fan died on the mbp, and I wand to start using my p.c. Anyway since it has become my htpc. The obvious problem is the migration of sync. I would like to not lose my emails and contacts (and aps too) when I redo my phone, but it says it will erase everything. So, how would I go about backing up my phone without losing my stuff? I’d appreciate help on this, thanks

    • just attach your iphone with the new computer. when it shows up in itunes, right click the icon on the left panel and create a backup. The only thing you would loose will be the music & video files.

    • thank you very much! I kind of thought that I could do that, but I am new to windows (well, recent windows) and am still unsure how that all works…man, I just need to get my mbp fixed :)

      anyway thanks again

  3. A huge chunk of these updates are already available on my jailbroken itouch – I’m not so sure I want to upgrade! Will I be able to jailbreak this new OS?

  4. I had been using android for a few months on the Nexus One while I waited to update to iOS 4, now that I got rid of the N1 and am using a 3GS again I will never go back to android.
    Apple has nailed multitasking, folders are awesome, overall the only other improvement I could see would be offering the iPhone on more carriers.

  5. Thanks finally for some content. Keep things coming.


    I updated to the new 4.0 firmware and i knew that all my jailbroken stuff would go away. However my custom carrier logo still stayed and i dont know how to change it without setting up as a new iphone. if i were to get the new iphone 4 and restore from a back up would it then transfer onto the new iphone? its a dead give away when taking it to apple to have it serviced.


    thanks so much doug for taking the time to respond to my question. I know your a busy guy! Now that I’m on the 4.0 software is there a way to change it now?

  8. Is anyone using a Bluetooth keyboard on iPhone 3GS other than Apple’s since updating to iOS 4? And if so, which one?

    • Just picked up a Microsoft Bluetooth keyboard 6000 from Staples for $50, works great.

  9. Is anyone else having a problem with the screen not displaying during a phone call and/or as the call is ending?? I upgraded to iOS4 and have lost that function, which I’m not sure is a bug or a software issue. Basically, I have to wait for the other person to hang up their phone and for mine to reset afterwards to the home screen. Any help would be greatly appreciated!!