How do I downgrade from iOS 27 to iOS 18 on iPhone?

Can you not downgrade at all or do you only have the option to downgrade to iOS 26?

If the first option, it's likely that you created a backup on iOS 27 that over-rid your previous backup, and beta backups cannot be restored on previous public software.

If the second option, then you'll only be able to downgrade to iOS 26, not 18. The only devices that can downgrade to iOS 18 are the iPhone XR, XS, or XS Max, since they only support iOS 18 as their furthest iOS and don't support 26.

How to uninstall iOS or iPadOS beta software - Apple Support

Samuel-F wrote:

Hello 👋

...

After you restart your iPhone, if you used iCloud backups, make sure to setup your iPhone without using Quick Start (otherwise your backups from iOS 26 might not appear)

...

What baclups? Unless they had the good sense to turn off icloud backups it will be ios27 and useless.

As I say Apple offer zero support and don't tell beta testers that only an archived ios26 backup on a Mac is of any use. Your link is likely to lose the reader all their data without that caveat.

I have an issue with this: "iOS 26 is incredibly stable and, honestly, runs much better than iOS 18 ever did." A statement like that should be qualified with an appropriate device. I just upgrade my iPad it 26.7. Yes it runs but now it is it is slower and jerky. I should not have upgraded but now it is too late. I'm screwed.

Arroru wrote:

[SPAM]

Some of the links in the message from Arroru are to hacking sites. Do not click links in their post!!!!!

I need to install IOS 27

Do you have a spare phone for iOS 27?

malcom180 wrote:

I need to install IOS 27

In other words, “I need to take a chance that I will break my phone because iOS 27 is a test version with lots of bugs”

Only install beta software on spare devices, not on daily drivers

malcom180 wrote:

I need to install IOS 27

Unless you are an active developer, you need to wait for the final version this fall.

malcom180 wrote:

I need to install IOS 27

Apple Beta Software Programme

Apple encourage public participation but offer absolutely no support , be warned.

eu quero votar meu iPhone 11 o iOS 18

iOS 18 need

Yes, I want to revert my phone's iOS from 27 back to iOS 18. downgrade

I want to because it’s slow on iOS 27