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iOS 4
2010 mobile operating system

iOS 4 is the fourth major release of iOS, announced on April 8, 2010, and released on June 21, 2010. It introduced features like home screen folders, multitasking for apps such as Internet calling and location services, unified Mail inbox, Game Center, and FaceTime video calling. While it improved user experience, iOS 4 caused performance and battery issues on the iPhone 3G, leading to a lawsuit. It was the last version to support the second-generation iPod Touch and featured the iPod app before being replaced by Music and Videos apps in iOS 5, its successor released in 2011.

Apps

History

iOS 4 was introduced at the Apple Special Event on April 8, 2010. At the WWDC keynote address on June 7, 2010, it was named iOS 4 and not iPhone OS 4 in order to be more inclusive to the iPod Touch and iPad.3

iOS 4 was officially released on June 21, 2010.4

System features

Folders

iOS 4 added folders for apps, which raises the maximum number of home screen apps from 180 to 2,160. These folders would automatically be named based on the containing apps' respective App Store category.5

Multitasking

iOS 4 introduced multitasking, replacing the home button shortcuts feature which had a similar albeit more limited function. It allows users to switch between apps instantly by clicking the home button two times. It was implemented in such a way that did not cause excessive battery drain. Multitasking was limited to apps dealing with Internet calling, location, and audio playback, while a similar "Fast App Switching" technology meant users could leave an app and enter another, with the original app remaining in the background until the user returns.67 This feature was notably absent from iPhone 3G and the second-generation iPod Touch due to performance issues.

iOS 4 introduced a spell checking feature that underlined misspelled words in red. Tapping on the word would provide a pop-up with a recommended replacement.8

Camera

The Camera app now supports 5x digital zoom.9

Apps

The Mail app featured a unified inbox on iOS 4, allowing users to see messages from all of their email accounts displayed together in a single inbox.10 It also gained support for MobileMe e-mail aliases and multiple Exchange accounts for business users.11

iOS 4.1 added a new app called Game Center, an online multiplayer social gaming network, which allows users to invite friends to play games and to compare their scores on a leaderboard.1213 It was not available on the iPhone 3G.14

FaceTime

iOS 4 introduced FaceTime, a videotelephony app that uses the device's camera to allow the user to make video calls with other FaceTime users.15 This feature was absent from the iPhone 3G, second-generation iPod Touch, iPhone 3GS, and third-generation iPod Touch due to the lack of required features, such as a front-facing camera.

Safari

The Safari mobile web browser on iOS 4 added Bing as a search option in addition to Google and Yahoo!.16 Beginning with iOS 4.2.1, specific words or phrases on a page could be searched.17

Features added on the iPhone inherited from the iPad

On the iPhone, the ability to choose wallpapers and see them on the home screen was also added, and the iPad had its ones replaced to be consistent, though the feature was notably absent from iPhone 3G and the second-generation iPod Touch due to poor performance of icon animations.18

The iPhone's dock was updated to be skeuomorphic, as with the Dock on the iPad and Mac OS X, and no longer has a grey line underneath it; the icons were redesigned to match.

iOS 4 introduced iPhone and iPod Touch support in iBooks, which was already included on the iPad. Though not a default app, it was available through the App Store.19

Problems

Performance and battery issues

iPhone 3G users reported performance and battery issues after upgrading to iOS 4. Apple started an investigation of the matter in July 2010.20 In November, Apple was sued for the issues, with an unsatisfied customer alleging "violating the Consumer Legal Remedies Act, unfair business practices, and false and deceptive advertising", with further allegations that Apple knew its software would cause problems on older models. Apple never responded to the allegations, but wrote in a reply to another unsatisfied customer in August 2010 that updates were "coming soon".2122

Alarm clock

In all versions of iOS 4, the alarm clock in the clock app had a problem in DST when it would go off an hour too early or too late.23

Antenna problems

Upon its release, some iPhone 4 users reported having technical problems with the phone's antennas.24 Apple attempted to fix the issue in software with iOS 4.0.1,25 but failed to do so.26

Supported devices

iOS 4 drops support for the first-generation iPhone and first-generation iPod Touch. The first-generation iPod Touch did not receive support due to hardware limitations. This marks the first time Apple has dropped support for an iPhone while retaining support for another model featuring the same or a less powerful system on a chip. The iPhone 3GS and iPod Touch (3rd generation) has partial support, and the iPhone 3G and iPod Touch (2nd generation) have limited support.27

iPhone

iPod Touch

iPad

Apple TV

Version history

VersionBuildCodenameRelease dateNotesUpdate type
4.08A293ApexJune 21, 201028Initial release for iPhone 4 GSM
  • Allows use of multiple Mail inboxes
  • Adds support for folders for app organization
  • Allows creation of music playlists
  • Introduces the iBooks app
  • Adds tap-to-focus in the Camera app
  • Allows uses of Bluetooth keyboards
  • Allows users to gift apps to other Apple IDs in the App Store, as long as those apps contained no fraudulent information
  • Adds spellcheck
  • iPhone 3GS and iPhone 4 only:
    • Adds support for multitasking
    • Adds support for setting a home screen wallpaper
  • iPhone 4 only:
    • LED flash for camera
    • 5x digital camera zoom
    • FaceTime
Initial Release
4.0.18A306July 15, 2010Only for iPhones
  • Changes the algorithm that displays cellular signal strength after Antennagate29
  • Fixes a bug with Microsoft Exchange accounts
Bug Fixes
4.0.28A400August 11, 2010
  • Fixes a bug that allowed a maliciously crafted PDF to lead to arbitrary code execution30
  • Fixes a bug that allows code running as user to gain system privileges

Due to all these patches, JailbreakMe 2.0 stops working.

Bug Fixes
4.18B1178B11831BakerSeptember 8, 2010Initial release on iPod Touch (4th generation)
  • Adds HDR photo capture support to the iPhone 4
  • Allows upload of high definition videos captured on the iPhone 4 to YouTube and MobileMe
  • Fixes a bug that allowed a maliciously crafted .tiff image to lead to arbitrary code execution32
  • Fixes a bug that allowed an attacker in a privileged network position to redirect FaceTime calls
  • Fixes multiple bugs that caused visiting a maliciously crafted website to lead to arbitrary code execution
  • Exclusive to iPhone 3GS, iPhone 4, and iPod touch (3rd generation):
    • Game Center, a service that allows syncing of game save data, achievements, and more. Game Center had previously been part of developer versions of iOS 4.33
Feature Update
4.28C134UnknownNovember 1, 201034
  • Adds AirPlay, allowing devices to stream audio or video to the Apple TV (1st generation)
  • Adds AirPrint, allowing devices to print wirelessly to some HP ePrint printers
  • Allows users to create a free MobileMe account to access Find My iPhone, which allows location tracking and remote locking or wiping of a device
  • Adds support for the iPad (1st generation)
  • Birthdays calendar does not display birthdays starting more than 77 years ago.
  • 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.
  • Improved iPhone 3G and iPod Touch (2nd generation) performance.
  • Import .ics calendar files directly for events.
  • Improved battery performance.
  • Birthdays icon has been changed in the Calendar app.
  • Text search on web pages. (iPhone 3GS and iPod touch 3 and 4 only)
  • 2 new fonts for Notes in Settings (Helvetica and Chalkboard).

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. 35
  • The font size of text in Calendar can now be changed in the Accessibility settings.

Fixes Voice over IP (VoIP) issues.Find My iPhone location feature is free (iPhone 4, iPod Touch (4th generation), and iPad) running on iOS 4.2.1.

  • More than 30 new keyboards and dictionaries, including Arabic, Greek, and Hebrew.
  • New animation for Multitasking.

New bookmarks design (iPhone and iPod Touch only).

  • New Voice Memos icon.
  • Ability to initiate FaceTime calls from Voice Control. (iPhone 4 only)

FaceTime shortcut from Messages app (iPhone 4 only).

  • New text tone alerts (New and Original tone lists) (iPhone 4 only).

Ringer and alerts on/off switch (Settings > Sounds) for volume buttons (iPhone only).

  • Assign different text tone alerts to each contact.
Feature Update
4.2.1368C1488C148a37JasperNovember 22, 201038Last version of iOS to run on iPhone 3G and iPod Touch (2nd generation) due to hardware and performance issues.
  • Replaces iOS 4.2 as iOS 4.2 prevented Wi-Fi from working on the iPad (1st generation), iOS 4.2 was later pulled from public view
Bug Fixes
All devices except for iPhone 4 (CDMA)
4.38F1908F19139DurangoMarch 4, 2011Initial release on iPad 2
  • Adds personal hotspot to the iPhone 4 (GSM)
  • Introduces iTunes home sharing
  • Improves AirPlay4041
  • Fixes multiple vulnerabilities in FreeType
  • Fixes multiple bugs that caused viewing maliciously crafted .tiff images to lead to arbitrary code execution
  • Fixes many, many bugs in WebKit that caused viewing a maliciously crafted website to lead to arbitrary code execution
  • Fixes a bug that allowed an attacker connected to the same network as an iPhone to be able to trigger a remote reset
Initial Release, Feature Update
4.3.18G4March 25, 2011
  • Fixes iPod touch screen glitches
  • Fixes bugs that prevented activation and connection of iPhones42
  • Fixes image flicker when using Apple Digital AV Adapter
  • Updates SSL certificates after fraudulent certificates were issued by a Comodo affiliate registration authority
  • Fixes multiple bugs that caused viewing of a maliciously crafted website to lead to arbitrary code execution43
Bug Fixes
4.3.28H78H844April 14, 2011
  • Fixes a bug that caused FaceTime calls to freeze
  • Fixes connectivity issues on cellular-equipped iPads
  • Updates SSL certificates after fraudulent certificates were issued by a Comodo affiliate registration authority
  • Fixes multiple bugs that caused viewing of a maliciously crafted website to lead to arbitrary code execution45
Bug Fixes
4.3.38J2May 4, 2011
  • Fixes a bug that caused location to be reported incorrectly46
Bug Fixes
4.3.48K2July 15, 2011
  • Fixes bugs that caused viewing a maliciously crafted PDF to cause arbitrary code execution
  • Fixes a bug that caused code running as user to gain system privileges47

It also patches the latest version of JailbreakMe (JailbreakMe 3.0).

Bug Fixes
4.3.58L1July 25, 2011
  • Fixes a bug that allowed an attacker in a privileged network position to capture and/or modify data in SSL/TLS-protected network sessions
Bug Fixes
iPhone 4 (CDMA) only
4.2.58E128UnknownJanuary 11, 2011Preview release on iPhone 4 (CDMA). Only available to reviewers, never shipped on release devicesPreview Release
4.2.68E200PhoenixJanuary 31, 2011Initial release on iPhone 4 (CDMA), as while 4.2.5 also came with the device, 4.2.6 was the first public version.
  • Bug fixes for personal hotspots
Initial Release
4.2.78E303April 14, 2011
  • Fixes a bug that caused FaceTime calls to freeze
  • Updates SSL certificates after fraudulent certificates were issued by a Comodo affiliate registration authority
  • Fixes multiple bugs that caused viewing of a maliciously crafted website to lead to arbitrary code execution4950
Bug Fixes
4.2.88E401May 4, 2011
  • Fixes a bug that caused location to be reported incorrectly51
Bug Fixes
4.2.98E501July 15, 2011
  • Fixes bugs that caused viewing a maliciously crafted PDF to cause arbitrary code execution
  • Fixes a bug that caused code running as user to gain system privileges52

It also patches the latest version of JailbreakMe (JailbreakMe 3.0).

Bug Fixes
4.2.108E600July 25, 2011
  • Fixes a bug that allowed an attacker in a privileged network position to capture and/or modify data in SSL/TLS-protected network sessions53
Bug Fixes

References

  1. "iPhone OS 4 renamed iOS 4, launching June 21 with 1500 new features". Engadget. June 7, 2010. Retrieved November 18, 2023. https://www.engadget.com/2010-06-07-iphone-os-4-renamed-ios-gets-1500-new-features.html

  2. Hardawar, Devindra (October 12, 2011). "iOS 5 available now, makes the iPhone 4 feel completely new". VentureBeat. Archived from the original on February 7, 2017. Retrieved July 15, 2017. https://venturebeat.com/2011/10/12/ios-5-available/

  3. Patel, Nilay (June 7, 2010). "iPhone OS 4 renamed iOS 4, launching June 21 with 1500 new features". Engadget. AOL. Archived from the original on June 14, 2017. Retrieved July 15, 2017. https://www.engadget.com/2010/06/07/iphone-os-4-renamed-ios-gets-1500-new-features/

  4. Patel, Nilay (June 7, 2010). "iPhone OS 4 renamed iOS 4, launching June 21 with 1500 new features". Engadget. AOL. Archived from the original on June 14, 2017. Retrieved July 15, 2017. https://www.engadget.com/2010/06/07/iphone-os-4-renamed-ios-gets-1500-new-features/

  5. Frakes, Dan (June 21, 2010). "Hands on with iOS 4 folders". Macworld. International Data Group. Archived from the original on July 3, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1152168/ios4folders.html

  6. "iOS 4: What you need to know". Macworld. International Data Group. June 21, 2010. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1152167/ios4_need_to_know.html

  7. Newman, Jared (June 22, 2010). "Multitasking With iOS 4 is Horrible: Apple Blew It". PC World. International Data Group. Archived from the original on June 29, 2013. Retrieved July 15, 2017. http://www.pcworld.com/article/199528/Multitasking_With_iOS_4_is_Horrible_Apple_Blew_It.html

  8. Ritchie, Rene (July 13, 2010). "iOS 4 features: Spell-check and text replace". iMore. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://web.archive.org/web/20180510185141/https://www.imore.com/ios-4-features-spellcheck-text-replace

  9. Ionescu, Daniel (June 21, 2010). "Apple iOS 4: 10 Best Features". PC World. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.pcworld.com/article/199431/apple_ios4_10_best_features.html#slide10

  10. Ritchie, Rene (June 14, 2010). "iOS 4 review". iMore. Archived from the original on June 15, 2018. Retrieved July 15, 2017. https://www.imore.com/ios-4-review

  11. "iOS 4: What you need to know". Macworld. International Data Group. June 21, 2010. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1152167/ios4_need_to_know.html

  12. Holt, Chris (September 1, 2010). "iOS 4.1's Game Center to hit iPhone next week". Macworld. International Data Group. Archived from the original on January 15, 2018. Retrieved July 15, 2017. http://www.macworld.com/article/1153821/software-games/ios-gamecenter.html

  13. Grant, Christopher (September 8, 2010). "Download iOS 4.1 now, get Game Center (on your compatible iProduct)". Engadget. AOL. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.engadget.com/2010/09/08/download-ios-4-1-now-get-game-center-on-your-compatible-iprodu/

  14. Grant, Christopher (September 8, 2010). "Download iOS 4.1 now, get Game Center (on your compatible iProduct)". Engadget. AOL. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.engadget.com/2010/09/08/download-ios-4-1-now-get-game-center-on-your-compatible-iprodu/

  15. Dormehl, Luke (June 21, 2017). "Today in Apple history: iOS 4 brings multitasking and FaceTime". Cult of Mac. Archived from the original on June 22, 2017. Retrieved July 15, 2017. https://www.cultofmac.com/488032/today-apple-history-ios-4-facetime-multitasking/

  16. Sterling, Greg (June 7, 2010). "Bing Goes The iPhone". Search Engine Land. Archived from the original on July 29, 2017. Retrieved July 15, 2017. http://searchengineland.com/bing-comes-to-the-iphone-43753

  17. Ritchie, Rene (September 16, 2010). "iOS 4.2 features: Find text on Safari web page". iMore. Archived from the original on March 12, 2017. Retrieved July 15, 2017. https://web.archive.org/web/20170312124653/http://www.imore.com/ios-42-features-find-text-safari-web-page

  18. Slivka, Eric (June 22, 2010). "Steve Jobs on Lack of Custom Wallpapers in iOS 4 for iPhone 3G". MacRumors. Archived from the original on August 1, 2017. Retrieved July 15, 2017. https://www.macrumors.com/2010/06/22/steve-jobs-on-lack-of-custom-wallpapers-in-ios-4-for-iphone-3g/

  19. Brownlee, John (June 21, 2010). "iOS 4, iBooks for iPhone Now Available For Download". Cult of Mac. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.cultofmac.com/47634/ios-4-ibooks-for-iphone-now-available-for-download/

  20. Ogg, Erica (July 28, 2010). "Apple to investigate iOS 4 problems on iPhone 3G". CNET. CBS Interactive. Archived from the original on October 22, 2016. Retrieved July 15, 2017. https://www.cnet.com/news/apple-to-investigate-ios-4-problems-on-iphone-3g/

  21. Ogg, Erica (August 20, 2010). "Slow iPhone 3G? iOS update could be on the way". CNET. CBS Interactive. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.cnet.com/news/slow-iphone-3g-ios-update-could-be-on-the-way/

  22. Ogg, Erica (November 4, 2010). "Apple sued for iOS 4 problems on iPhone 3G, 3GS". CNET. CBS Interactive. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.cnet.com/news/apple-sued-for-ios-4-problems-on-iphone-3g-3gs/

  23. Beaumont, Claudine (November 1, 2010). "Apple iPhone 4 alarm clock bug makes scores late for work". The Daily Telegraph. Archived from the original on January 12, 2022. https://www.telegraph.co.uk/technology/apple/8101945/Apple-iPhone-4-alarm-clock-bug-makes-scores-late-for-work.html

  24. Chen, Brian X. (July 2, 2010). "Tests confirm iPhone 4's antenna flaws (Updated)". Wired. Condé Nast. Archived from the original on May 10, 2017. Retrieved July 15, 2017. https://www.wired.com/2010/07/iphone-4-anandtech

  25. Dilger, Daniel Eran (June 25, 2010). "Death Grip hysteria may end Monday with iOS 4.01". AppleInsider. Archived from the original on November 13, 2017. Retrieved July 15, 2017. http://appleinsider.com/articles/10/06/25/death_grip_hysteria_may_end_monday_with_ios_4_01.html

  26. Ionescu, Daniel (July 17, 2010). "Apple's iPhone 4 Antennagate Timeline". PC World. International Data Group. Archived from the original on July 15, 2017. Retrieved July 15, 2017. http://www.pcworld.com/article/201297/apples_iphone_4_antenna_gate_timeline.html

  27. Multitasking, home screen wallpapers and Bluetooth keyboard support are not available on both the iPhone 3G and iPod Touch (2nd generation), while Game Center, Apple's gaming network, was available on the iPod Touch (2nd generation) but not on the iPhone 3G. FaceTime is not supported on iPhone 3G and 3GS, and the iPod Touch 2nd and 3rd generations.

  28. Patel, Nilay (June 7, 2010). "iPhone OS 4 renamed iOS 4, launching June 21 with 1500 new features". Engadget. AOL. Archived from the original on June 14, 2017. Retrieved July 15, 2017. https://www.engadget.com/2010/06/07/iphone-os-4-renamed-ios-gets-1500-new-features/

  29. Chartier, David (July 15, 2010). "Apple releases iOS 4.0.1 with new iPhone signal formula". Macworld. International Data Group. Archived from the original on May 11, 2018. Retrieved July 15, 2017. http://www.macworld.com/article/1152733/iOS4_0_1.html

  30. Sande, Steven (August 11, 2010). "iOS 4.0.2 for iPhone/iPod Touch, iOS 3.2.2 updates available now". Engadget. AOL. Archived from the original on May 10, 2018. Retrieved July 15, 2017. https://www.engadget.com/2010/08/11/ios-4-0-2-for-iphone-ipod-touch-ios-3-2-2-updates-available-now/

  31. iPod Touch (4th generation) only /wiki/IPod_Touch_(4th_generation)

  32. Slivka, Eric (September 8, 2010). "Apple Releases iOS 4.1 for iPhone and iPod Touch". MacRumors. Archived from the original on May 11, 2018. Retrieved July 15, 2017. https://www.macrumors.com/2010/09/08/apple-releases-ios-4-1-for-iphone-and-ipod-touch/

  33. Kumparak, Greg. "iOS 4.1 brings a whole new look to Apple's Game Center". MobileCrunch. TechCrunch. Retrieved August 29, 2023. https://web.archive.org/web/20100717040031if_/http://www.mobilecrunch.com:80/2010/07/14/ios-4-1-brings-a-whole-new-look-to-apples-game-center/

  34. "iOS 4.2 GM Download Available Now". OS X Daily. November 1, 2010. Retrieved December 31, 2023. https://osxdaily.com/2010/11/01/ios-4-2-gm-available-now/

  35. "iOS 4.2 packs new, improved YouTube, FaceTime features and more". AppleInsider. September 16, 2010. Retrieved September 26, 2024. https://web.archive.org/web/20210629224133mp_/https://appleinsider.com/articles/10/09/16/ios_4_2_packs_new_improved_youtube_facetime_features_and_more.html

  36. No public release of iOS 4.2 is available, due to an issue that impacted Wi-Fi functionality on the iPad.[30]

  37. iPhone 3GS only /wiki/IPhone_3GS

  38. Caldwell, Serenity (November 18, 2010). "Apple releases iOS 4.2.1 GM to developers". Macworld. International Data Group. Archived from the original on December 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1155831/ios_421.html

  39. iPad 2 only /wiki/IPad_2

  40. Rawson, Chris (March 4, 2011). "iOS 4.3 brings a handful of new features and new headaches". Engadget. AOL. Archived from the original on May 10, 2017. Retrieved July 15, 2017. https://www.engadget.com/2011/03/04/ios-4-3-brings-a-handful-of-new-features-and-new-headaches/

  41. "iOS: A visual history". The Verge. Vox Media. September 16, 2013. Archived from the original on April 12, 2017. Retrieved July 15, 2017. https://www.theverge.com/2011/12/13/2612736/ios-history-iphone-ipad

  42. Cheng, Jacqui (March 25, 2011). "iOS 4.3.1 fixes iPod Touch graphics glitch, TV flickering issue". Ars Technica. Condé Nast. Archived from the original on May 11, 2017. Retrieved July 15, 2017. https://arstechnica.com/apple/2011/03/ios-431-fixes-ipod-touch-graphics-glitch-tv-flickering-issue/

  43. Friedman, Lex (April 14, 2011). "Apple releases iOS 4.3.2, fixes FaceTime, 3G issues". Macworld. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1159239/ios432.html

  44. iPad 2 (CDMA) only

  45. Moren, Dan (May 4, 2011). "Apple releases iOS 4.3.3 to patch location bugs". Macworld. International Data Group. Archived from the original on June 19, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1159643/ios433_location_fixes.html

  46. White, Charlie (July 15, 2011). "Apple iOS 4.3.4 Update Available, Prevents Hacking & Jailbreaking". Mashable. Archived from the original on March 12, 2017. Retrieved July 15, 2017. http://mashable.com/2011/07/15/ios-4-3-4-update/

  47. Friedman, Lex (July 25, 2011). "Apple releases iOS 4.3.5 to fix certificate validation". Macworld. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1161328/ios435.html

  48. "Apple's new CDMA iPhone has built-in Wi-Fi hotspot with iOS 4.2.5". AppleInsider. January 11, 2011. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://appleinsider.com/articles/11/01/11/apples_new_cdma_iphone_has_built_in_wi_fi_hotspot_with_ios_4_2_5

  49. Friedman, Lex (April 14, 2011). "Apple releases iOS 4.3.2, fixes FaceTime, 3G issues". Macworld. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1159239/ios432.html

  50. Moren, Dan (May 4, 2011). "Apple releases iOS 4.3.3 to patch location bugs". Macworld. International Data Group. Archived from the original on June 19, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1159643/ios433_location_fixes.html

  51. White, Charlie (July 15, 2011). "Apple iOS 4.3.4 Update Available, Prevents Hacking & Jailbreaking". Mashable. Archived from the original on March 12, 2017. Retrieved July 15, 2017. http://mashable.com/2011/07/15/ios-4-3-4-update/

  52. Friedman, Lex (July 25, 2011). "Apple releases iOS 4.3.5 to fix certificate validation". Macworld. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1161328/ios435.html

  53. Friedman, Lex (July 25, 2011). "Apple releases iOS 4.3.5 to fix certificate validation". Macworld. International Data Group. Archived from the original on May 10, 2017. Retrieved July 15, 2017. http://www.macworld.com/article/1161328/ios435.html