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iOS 4 Information

(15 July 2010) Apple released IOS 4.0.

The iOS 4.0.1 Software Update improves the formula to determine how many bars of signal strength to display on iPhone 4, iPhone 3GS, and iPhone 3G. The real signal strength remains the same, but the bars on iPhone will indicate it more precisely.

Finally around 1309 today (21 June 2010) Apple released IOS 4.0. 



You will need to update to I-Tunes


iOS 4 Software Update


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: