Unlock IPhone 4 OS 4.01>> Yes / No

Discussion in 'Jailbreaks and iOS Hacks' started by iphonetoday, Sep 13, 2010.

  1. iphonetoday macrumors regular

    May 14, 2009
    hi all

    if i'm buying iphone 4 today will i able to unlock/jailbrake it firmware 4.01

    couple day ago i looking series on a back week 31 so dont know
    os 4.1 or 4.02

    thank you
  2. eldy macrumors 6502

    Jan 30, 2009
    The City
    Go to Settings > General > About and tell us your Modem Firmware version.
  3. iphonetoday thread starter macrumors regular

    May 14, 2009
    dont buy yet ?

    just guess that shipment may be 4.1 already if i'm buy today ..

    what if 4.1 firmware

    could i downgrade to 4.01 and unlock it
  4. sidewinder macrumors 68020


    Dec 10, 2008
    Northern California

  5. iphonetoday thread starter macrumors regular

    May 14, 2009
    so , look like all iphone in store now upgrade to 4.1 ,

    what about firmware 4.02 ?

    can it roll back to 4.01 then unlock ?
  6. IrishVixen macrumors 68020


    Jun 20, 2010
    No. You won't be able to roll back the firmware on a brand new phone.
  7. maturola macrumors 68040


    Oct 29, 2007
    Atlanta, GA
    If the iPhone is 4.1 - you are SOL

    If the Firmware is 4.0.2

    A) Are you getting from Apple? (don't think you can get one with 4.0.2 anymore) if yes, them you are SOL
    B) if no, them are you getting from ebay/craiglist/friend/newsapaer, etc .... Them if the previews owner saved the SHSHs on Cydia, you will be able to restore to 4.0.1 jailbreak and unlock. However if the previews owner update to 4.1 or 4.1 beta at any point, the phone may have an updated basedband which is not unlockable at the moment (if ever), in that case you will be able to jailbreake but not unlock.

    if Firmware is 4.0.1

    * If that is the case.....you may be getting it from a 3er party so same point B) above applies

    As you can see, this is not a simple question that can be answer without more details and information, it is very dependent on each device.

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