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PostPosted: Sun Oct 07, 2018 11:18 am 
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We are heading back to Japan and I don't want to do the big iPhone update to 12 just now. (We have an iPhone 6s.)

I never updated iOS 11 beyond 11.2 and now 12 is out! - - we were out of the country and I hate doing updates whilst on the road.

I intend to wait until we return to do the update to 12. I don't want to use iCloud Drive ever or 2 step authentication (?) which were ushed with 11.3 or 4?

I don't use the phone for much while traveling other than Google Translate, an occasional online map or trip info search, and the Camera. Occasionally iMessage (but we mostly do that on the computer)

Once I do do the update to 12, will I still be able to backup the phone on an El Cap MacBook Pro, or will I have to update to Sierra or HS in order to continue to update via iTunes?

I don’t know if I should try to update to 11.4.1 before we go - but I’ve not read good reviews and I know I can’t go back further than that - if I can even do that safely.

Are any of these places safe to download from and install? I might just download now and wait till we return to install or just go to 12 on our return. I don’t know.

I don’t have the time to learn how to do a firmware update now - so the update may have to wait, but I wondered about getting the download just in case - IF it is safe.

Thoughts?

IS any of this a safe alternative to getting 11.4.1 from the App Store which I can’t?
https://ipsw.me/
https://ipsw.me/#!/version

http://osxdaily.com/2018/07/09/ios-11-4 ... load-ipsw/

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PostPosted: Sun Oct 07, 2018 4:13 pm 
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Personlly I'd hold off on iOS12 due to bugs...

https://www.macworld.co.uk/news/iosapps ... -3664535-3

Quote:
iOS 12 is was released September 17, 2018. Please make sure to backup your data on your iphone, ipad, or ipod touch and not apply any update until you are certain that iTunes on your Mac or PC can handle it.

https://discussions.apple.com/docs/DOC-8871


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PostPosted: Sun Oct 07, 2018 6:07 pm 
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BDAqua wrote:
Personlly I'd hold off on iOS12 due to bugs...


Thanks BDA.

I'm definitely going to wait to go to 12 until we return home - and maybe not then?

I am running iTunes 12.8 on El Cap and fear what the updates will do to me.

Things are working now so I'm not doing anything until we return.

Right now I am madly deleting photos - I had over 2000 from the last three trips stored on the phone (128GB iPhone 6s) - as well as on 4 different external hard drives.

I don't know if after deleting lots of photos there is something I need to do to make the phone happier.

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PostPosted: Tue Oct 09, 2018 5:34 am 
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Location: Minnesota, USA
The general rule for backing up to a computer is you have to use an iTunes version supporting by that particular iOS version, then that iTunes version has to be able to run under the macOS present on the computer. For a brand new iOS it will require the latest iTunes and you would have to be using that on the computer in order to do a backup or sync.

Let's take my iPhone 4S. It can run up to iOS9 and if I restore it, Apple will offer iOS9 and only iOS9. I don't know exactly what iTunes version is required to support that (Apple of course does not provide this information because they assume everybody is running the latest of everything) but probably any iTunes version released in the past 4 years or so will work with iOS9. However, I run Mavericks so I would have to make sure it was an iTunes version I can run on my computer.

The issue about using a downloaded ipsw file (apart from security) is Apple requires a process called signing to verify an installation of an iOS. Apple only signs a limited number of versions and I don't know if that process includes comparing the iOS version to the model phone you own. Because your phone can run the newest, even if you can get an iOS11.4 ipsw onto the phone, will the phone call Apple and will Apple do the signing process or will it insist you have the latest?


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