iPhone 4S, 4, 3GS and 3G Jailbreak and Unlock Status as At 22 October, 2011

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Here’s a one page summary of all things jailbreak and unlock for iPhone 3G, 3GS, 4 and 4S as at 22 October, 2011.

iPhone 4S

Jailbreak: not available.
Unlock: not available; contract-free factory unlocked iPhone 4S now sold at most Apple Stores worldwide.

Editor's note: learn more by reading our ebook on starting your own iPhone repair & unlock business

iPhone 4

Jailbreak: untethered for all iOS except iOS 5, iOS 4.3.5 and iOS 4.3.4.
Unlock (baseband): ultrasn0w on 1.59.00 only, Turbo SIM for 2.10.04, 3.10.01 and 4.10.01, baseband chip replacement possible for 4.11.08.

iPhone 3GS

Jailbreak: untethered for all iOS except iOS 5, iOS 4.3.5 and iOS 4.3.4.
Unlock (baseband): ultrasn0w 1.2.4 compatible on 4.26.08, 5.11.07, 5.12.01, 5.13.04 and 6.15.00 (iPad baseband). 5.14.02, 5.15.04, 5.16.02 and 5.16.05 cannot be unlocked – either update to 6.15.00 (read risks here) or replace baseband chip with version 5.13.04.

iPhone 3G

Jailbreak: untethered up to iOS 4.2.1 (highest iOS version supported).
Unlock (baseband): same as iPhone 3GS.


  • Baseband downgrade via software not possible; however it will work on iPhone 4 is the firmware is still being signed by Apple e.g. downgrade from 4.11.08  to 4.10.01.
  • iPhone 3GS iOS 4.1 is *currently* being signed by Apple, possible to downgrade for untethered jailbreak even if no SHSH saved.
  • If stuck on baseband 5.14.02, 5.15.04, 5.16.02 and 5.16.05, update to 6.15.00 using redsn0w to unlock with ultrasn0w (will break GPS).
  • iOS 5 updates baseband to 5.16.05 (3GS) and 4.11.08 (iPhone 4) – no unlock available.
  • iPhone 3GS (that needs unlocking) on iOS 5 baseband 5.16.05 can downgrade to iOS 4.1, update baseband to 6.15.00 and then update to iOS 5 using custom firmware. Read full guide here.
  • Never restore using stock firmware. Custom iOS 5 firmware (preserves baseband) available for download here.
  • Use iTunes 10.4 or below when working on iOS 4.x or earlier. iTunes 10.5 is only for iOS 5.
  • iPhone 4 IMEI unlock available form some European and Australian carriers.
  • Turbo SIM for iPhone 4 works on iOS 5 as long as the baseband is not 4.11.08.

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Comments & Discussion

  1. Hey,

    hopefully you can help me or give me an advice.
    I unlocked my iPhone for about half a year with Gevey on 4.2.1 and then 4.3.3

    Last week I upgraded to iOS 5. Everything went fine – until two days ago. I ran out of battery and then the unlock did not work anymore.
    I tried to restore it, I also downgraded to 4.3.3 and still I can do the whole procedure but in the end i get Searching… and No Service.

    Any advice what could go wrong or what I should try :/?

    Thanks anyway,


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