[Q] Restoring to iOS 10.3.3 while preserving data

Discussion in 'iOS 11' started by borgsauce, Oct 3, 2017.

  1. borgsauce macrumors regular

    borgsauce

    Joined:
    Dec 18, 2016
    #1
    Hey guys,

    I’ve been on iOS11.x for sometime now including latest 11.1 but I’m just not happy with the battery life. I would like to downgrade back to iOS10.3.3 but without losing any of the apps, data, media, etc. I read that there was a away but I don’t want to risk it without being absolutely certain that my WhatsApp contents remain intact including the media most importantly. I’ve done a backup but that’s only good for iOS11 versions. Appreciate any help. Thanks.
     
  2. C DM macrumors Sandy Bridge

    Joined:
    Oct 17, 2011
    #2
    Don't think there's any "absolutely certain" way really.
     
  3. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #3
    If you end up downgrading then you’ll have to set everything up from scratch anyway. So as long as you’ve taken a backup, your stuff in safe. Manual backup that is.
     
  4. borgsauce thread starter macrumors regular

    borgsauce

    Joined:
    Dec 18, 2016
    #4
    I’ve got a slow internet with a monthly bandwidth quota. Even if I do a backup it wont save the entire app, meaning even with restoring my backup I’ll still need to download the apps again. But if there isn’t a method that I’m looking for I’ll just stick to iOS11.1...
     
  5. Paddle1 macrumors 68040

    Joined:
    May 1, 2013
    #5
    Here are some things to know about backups:

    -They backup your installed apps and all of their data.

    -Some information stored in iCloud can be restored without a backup.

    -You can only restore backups from certain versions (generally older ones) and you cannot restore an iOS 11 backup to iOS 10.

    If you want to keep at least most of your information you'll need an iOS 10 backup.
    If you have an iTunes backup it can restore apps without redownloading, however they removed this feature in the latest version of iTunes.
     
  6. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #6
    Why don’t you back it up on your laptop? And while setting it up as a new device you can choose to install the apps from iTunes.
     
  7. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #7
    Wow really?!
     
  8. borgsauce thread starter macrumors regular

    borgsauce

    Joined:
    Dec 18, 2016
    #8
    You said it, there’s no option to restore the apps directly from iTunes without a stable internet connection. It just redownloads the same list of apps that were there before.
     
  9. borgsauce thread starter macrumors regular

    borgsauce

    Joined:
    Dec 18, 2016
    #9
    I doubt it backs up the complete app. I know this because the entirety of the apps memory usage is over 20GB while the backup folder is no more than 10GB.
     
  10. akash.nu macrumors 604

    akash.nu

    Joined:
    May 26, 2016
    #10
    If you’re talking about the app memory usage on your device then that includes app specific downloaded file as well, which may not be the actual app code.

    Eg : the memory usage of Spotify would include the downloaded tracks for offline viewing as well. When you back up the app, it doesn’t include those files.
     
  11. Konceptz804, Oct 3, 2017
    Last edited: Oct 3, 2017

    Konceptz804 macrumors member

    Joined:
    Jul 12, 2017
    #11
    You'll need itunes on a MAC or PC for this

    1. Download the full ipsw for your phone (google is your friend)
    2. Create a local backup in itunes that is encrpyted
    3. While holding shift (on PC, not sure what key on mac) click update, and a window will open asking for the IPSW
    4. Leave the iphone connected and than restore the local backup from itunes

    You'll need to setup touch ID again, but you'll be back on the iOS version of your choice.

    EDIT: Misread the post, I stand corrected, you cannot restore backups from difference versions of iOS
     
  12. Paddle1 macrumors 68040

    Joined:
    May 1, 2013
    #12
    Yep, they only want apps managed through the App Store now.
    You're right, the apps themselves are separate from the backup. Only their data is stored. iTunes used to store the app files separately but this was removed.
     
  13. newellj macrumors 604

    Joined:
    Oct 15, 2014
    Location:
    Boston, MA, US
    #13
    You don't have to set everything up from scratch if you've got the right backup file. Unless things have changed, you can't restore a backup that was created with a later version of iOS to a device running an earlier version. And, in general, newer backups overwrite older backups in iTunes. Also IIRC, the only really complete backup is an encrypted local backup, which stores most but not all app data.

    So what I believe you would need is an archived, encrypted local backup made while the machine was on iOS 10.x. Restore the device using the 10.3.3 .ipsw file (before Apple stops signing it), then restore an encrypted local backup. I've done this twice in a week with my two iPads and it works.
     
  14. Paddle1 macrumors 68040

    Joined:
    May 1, 2013
    #14
  15. Mlrollin91 macrumors G5

    Mlrollin91

    Joined:
    Nov 20, 2008
    Location:
    Ventura County
    #15
    You can not restore an iOS 11.1 backup on 10.3.3.
     
  16. Konceptz804 macrumors member

    Joined:
    Jul 12, 2017
    #16
    Misread the post, corrected my original response. Thanks
     
  17. borgsauce thread starter macrumors regular

    borgsauce

    Joined:
    Dec 18, 2016
    #17
    You see part of what I’m worried about is that my WhatsApp is registered to my old number and I’ve lost that SIM card since then. I’m out of country and I can’t get another sim without getting back home. Meaning for whatever reason if WhatsApp is reset and I’ll need to use my old number again to re-register through sms I’ll be screwed. Which is why I need to be sure that all apps and their current state is preserved through the firmware downgrading process.

    Btw thanks for that info I actually didn’t know you could backup WhatsApp contents into iCloud.
     

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16 October 3, 2017