iPhone SE Upgrade iPhone SE and keep iOS 10?

Discussion in 'iPhone' started by klasma, Jan 12, 2018.

  1. klasma macrumors newbie

    klasma

    Joined:
    Jun 8, 2017
    #1
    I'm considering upgrading from my iPhone SE 64 GB to the 128 GB model. (Originally I was waiting for the iPhone SE 2, but if it has a glass back I prefer to stay with the current SE for the time being.) I'm currently running iOS 10 and do not want to upgrade to iOS 11 (due to some 32-bit apps, among other things). My question: Under what circumstances can I restore a backup from my iPhone SE 64 GB to an iPhone SE 128 GB device (possibly a used one) and still keep iOS 10? Does it matter if the new device has been manufactured/sold before or after the iOS 11 release? Does it matter if it has been upgraded to iOS 11 in the meantime?

    I suspect that it’s not possible to downgrade a brand new (i.e., sold by Apple now) iPhone SE to iOS 10. On the other hand, I assume that it should be possible to restore my backup to an iPhone SE that was sold with iOS 10 and that is still running iOS 10, without having to upgrade to iOS 11. Can anyone confirm that? And what about an iPhone SE that was sold with iOS 10, then upgraded to iOS 11, and then restored to factory defaults again? Should that work too?

    Thanks in advance for any insights.
     
  2. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #2
    A few points…

    1. You can restore to a phone running a higher firmware from a backup made on lower firmware (i.e., iOS 10 to 11).
    2. You can NOT restore to a phone running a lower firmware from a backup made on higher firmware (i.e., iOS 11 to 10).
    3. You cannot downgrade the firmware of any device if Apple is not signing it.
    4. No matter what backup you have made on what firmware, it does NOT store system files. Backups only store personal data.
    5. An Erase all Contents and Settings on the device will restore you to the version currently on the device even if Apple is no longer signing it. Only iTunes restores force upgrades/updates.

    Because of number 4, if you make a backup of your iOS 10 device and you get a new device with iOS 11 you will still be on iOS 11.


    Hope that helps.
     
  3. klasma thread starter macrumors newbie

    klasma

    Joined:
    Jun 8, 2017
    #3
    Thanks. So 3 & 5 in particular mean that after a device had iOS 11 firmware at any point, it’s impossible to run iOS 10 on it, even when restoring from a backup made on iOS 10. In other words, the only way to get the result I want is to obtain a device that is still running iOS 10 and restore the iOS 10 based backup to it.
     
  4. eyoungren macrumors P6

    eyoungren

    Joined:
    Aug 31, 2011
    Location:
    ten-zero-eleven-zero-zero by zero-two
    #4
    That is correct.
     
  5. Paddle1 macrumors 68040

    Joined:
    May 1, 2013
    #5
    And it has to be the right version of iOS 10 to restore your backup on. For example I'm pretty sure you can't restore 10.3 backups to 10.1.
     
  6. Mr_Brightside_@ macrumors 68020

    Mr_Brightside_@

    Joined:
    Sep 23, 2005
    Location:
    The 6ix
    #6
    The exception would be if they start signing iOS 10 again, but besides this week's fiasco that almost never happens.
     
  7. Brandonjr36 macrumors 6502a

    Brandonjr36

    Joined:
    Sep 12, 2016
    Location:
    Joplin
    #7
    When I bought an se to use while waiting for my X to come in the mail. It was running iOS 10. If you find one running 10 but your current phone is on an older software then you need to download the AT&T mobile transfer and just transfer everything. That is what I did when my X had a problem and I wanted to stay on 11.1 so I can jailbreak.
     
  8. Glmnet1 macrumors 6502

    Joined:
    Oct 21, 2017
    #8
    Why do you need the additional space? Isn't it far easier and less expensive to simply delete a few things from your phone for now?

    We still don't know for sure what the SE 2 (if there is one) will be like. If it comes out in two months and you like it, you'll regret upgrading to the same model.
     
  9. klasma thread starter macrumors newbie

    klasma

    Joined:
    Jun 8, 2017
    #9
    I've been at the limit for some time now and I'd like to have a larger portion of my music collection on the phone. Sure, maybe I'll like the SE 2 after all, but I'm fine with taking that risk. The alternative means living with 64 GB for the next 2+ years, which isn't that attractive.
     
  10. newellj macrumors 603

    Joined:
    Oct 15, 2014
    Location:
    Boston, MA, US
    #10
    This is correct. Which means that if you're buying a used SE you want to be very sure which version, exactly, is running on the phone.
     
  11. klasma thread starter macrumors newbie

    klasma

    Joined:
    Jun 8, 2017
    #11
    If necessary I could probably get by without a restore. The more difficult thing is to actually find a device for sale that’s still on iOS 10.
     
  12. newellj macrumors 603

    Joined:
    Oct 15, 2014
    Location:
    Boston, MA, US
    #12
    Yes...you might do better looking locally on Craigslist? All the usual cautions apply!
     
  13. nburwell macrumors 68040

    nburwell

    Joined:
    May 6, 2008
    Location:
    PHL
    #13
    I think you’ll need to find a used SE on Swappa, eBay or Craigslist and see if the seller still has the device on iOS 10.
     

Share This Page