Downgrading iPhone 4 to older OS

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Daddy Mac, Jul 14, 2010.

  1. Daddy Mac macrumors member

    Joined:
    Jun 9, 2010
    #1
    I dont know if this is possible but can you downgrade your iPhone 4 OS to an older one. This may help determine if the proximity sensor issue is hardware or software right? I dont know how all this works so be kind.
     
  2. rattleglans macrumors newbie

    Joined:
    Dec 14, 2009
    #2
    I'm mostly sure you can't
     
  3. hipvamore macrumors regular

    Joined:
    Jul 2, 2008
    Location:
    CT
  4. draz macrumors 6502a

    Joined:
    Jun 20, 2010
    #4
    You can't because Apple releases specific firmware for each of their iPhones so there needs to be an iPhone 4 firmware for iOS 3.x.x which there is not.
     
  5. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #5
    Like said above, not possible to downgrade it to anything but 4.0 cause thats the earliest firmware ever made for iphone 4's.
    3.0+ firmware were only made for 2G, 3G and 3GS models.
     

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