How to downgrade from iOS 9.1 to iOS 8.x?

Discussion in 'iOS 9' started by SHNXX, Nov 6, 2015.

  1. SHNXX macrumors 68000

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    Oct 2, 2013
    #1
    I have an iphone 6 that i would like to test something on which requires iOS 8.x.
    How can I downgrade it to iOS8?
     
  2. Mlrollin91 macrumors G4

    Mlrollin91

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  3. gsmornot macrumors 68030

    gsmornot

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    Sep 29, 2014
    #3
    To expand, Apple stops signing older versions as new come out. If you found an older version and tried to load it, it would fail the verification test that is part of the install.
     
  4. Mlrollin91 macrumors G4

    Mlrollin91

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    #4
    I probably should have explained. Thanks for coming in with the assist!
     
  5. SHNXX thread starter macrumors 68000

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  6. gsmornot macrumors 68030

    gsmornot

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    #6
    No. Restore would only help if your device still had the older version installed. You can restore a backup make on 8.x if your device is still loaded with 8.x iOS.
     
  7. SHNXX thread starter macrumors 68000

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    Oct 2, 2013
    #7
    wow. that really sucks.
    so there's no way to revert any of my iOS9 devices to iOS8?
    damn! i wanted to test something from Swift1.2
    what a bummer
     
  8. Radon87000 macrumors 601

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    Nov 29, 2013
    #8
    No.Is lag the problem?
     
  9. SHNXX thread starter macrumors 68000

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  10. gsmornot macrumors 68030

    gsmornot

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    #10
  11. zorinlynx macrumors 601

    zorinlynx

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    #11
    Is there a reason you need to test on iOS 8?

    100% of devices that can run iOS 8 can be upgraded to iOS 9. Basically, no devices were "left behind" this cycle. So it's not really a problem to just require iOS 9 for your app; you won't be abandoning any customers.

    This is not like 7->8 where iPhone 4 users were left behind.
     
  12. lagwagon Suspended

    lagwagon

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    #12
    LOL. You just can't resist bringing lag up can you?
     
  13. SHNXX thread starter macrumors 68000

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    Oct 2, 2013
    #13
    Yeah... Actually this is embarrassing but the project was written in swift1.2 and I wanted to demo it on ios8 phone first, before upgrading to 2.0.
    God I hate how Apple doesn't let you compile in 1.2 anymore on xcode7 and push it onto ios9 device, even though ios9 can run swift1.2
     
  14. Radon87000 macrumors 601

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    Nov 29, 2013
    #14
    He replied before I posted.Its one of the most common reasons
     
  15. f77coder macrumors newbie

    f77coder

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    #15
    get a developer account, get xcode,register you dev with your account. search the web, easy to find old signed version of iOS, hell I have kept every version for my iPad for the last 3 years, i can downgrade to any.
     
  16. Adam-Jobs macrumors regular

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    Mar 28, 2011
    #16
    I wish I could downgrade. I've lost all my messages from 2008 because I upgraded.
     
  17. C DM macrumors Westmere

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    Oct 17, 2011
    #17
    How would downgrading fix it?
     
  18. chrfr macrumors 603

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    Jul 11, 2009
    #18
    You can download all the old versions of iOS without having a developer account, but you won't be able to install them, regardless of whether you have an account or not. Apple is only signing 9.1 now.
     
  19. Mark1542 macrumors newbie

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    Jul 22, 2013
    #19
    What happens if somebody tries to install iOS 8.4 when it isn't signed? A friend tried this and now can't get his iPad working. Is there a fix?
     
  20. chrfr macrumors 603

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    Jul 11, 2009
    #20
    You'll have to restore to 9.1 with iTunes.
     
  21. Adam-Jobs macrumors regular

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    Mar 28, 2011
    #21
    Because my iPhone worked fine on 8.4. Messages and everything. I still have a backup. So if there was a way to downgrade I could fix it.
     
  22. C DM macrumors Westmere

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    Oct 17, 2011
    #22
    There same backup can be loaded onto
    iOS 9 and should work the same way. If it doesn't, then perhaps something is wrong with the backup (and it likely would have similar issues being used with iOS 8).
     
  23. Adam-Jobs macrumors regular

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    Mar 28, 2011
    #23
    Usually I'd agree sir. In this instance I've updated my iPad. And used the iPad backup and all my messages are there. Use the iPad back up on my iPhone, and again nothing! Or would it not bring up the messages from my iPad backup? Desperate for a fix. Apple were useless on the phone
     
  24. iPad Retina macrumors 6502a

    iPad Retina

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    Jan 6, 2013
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    Canada
    #24
    I've saved my SHSH blobs. When i got my replacement it was running 8.4.1. Have you saved your SHSH blobs? Do they work on other devices another replacement device?
     
  25. ielessar macrumors regular

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    WJ
    #25

    No they are for that particular device from which they were extracted.
     

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