How to Downgrade iOS 26 to 18

Accidentally? Really?? It's hardly easy or accidental to have installed the developer beta. Since you're a developer, you must have known you needed to create an Archive Backup on your computer before you updated right? If you didn't, yes, you can go back to the public release of iOS 18.5, but you will have to use your computer to erase the phone and if you didn't make an Archive backup, you're going to lose ALL the data on your phone.

See what you need to do here --> How to uninstall iOS or iPadOS beta software - Apple Support

check this☝ tool and this👇articale to see if that helps.

How to uninstall iOS or iPadOS beta software - Apple Support

You cannot do this.

Bob Timmons wrote:

You cannot do this.

If you updated your phone this week to iOS 26, you cannot go back. Downgrading is NOT supported. So learn to appreciate the new iOS 26.

tringa80 wrote:

Removed uos 26 to ios 18 please

It's a one page thread. Read it. The answer is NO, you cannot remove iOS 26 and go back to iOS 18.

Re: “ I may have a copy of earlier system on an external drive.. If I replaced this computer on sys. 26 would it be possible to get the older system back if it is on that external hard drive?”

If you are asking about downgrading a Mac running macOS 26 (Tahoe) to an earlier version of macOS, such as Sequoia, that might be possible. You would need a Mac compatible with the older version, and there might be pitfalls to watch out for, including ones not usually encountered in older days.

But this is the iPhone forum and we are talking about the iPhone operating system, iOS. You cannot downgrade an iPhone from iOS 26 to an earlier version of iOS, even if you successfully downgrade the version of macOS on your Mac.

Can anyone share a clear, step-by-step downgrade method to restore my device to iOS 18 without losing important data?

Apple's instructions are in the link below, but you are going to lose all of the data on your Phone when you revert to iOS 18.....unless....you made a separate "archive" backup on a Mac or PC.....before.....you installed the beta software.

How to uninstall iOS or iPadOS beta software - Apple Support

I also upgraded to the new iOS 26..

don’t like it at all 😢

I have auto back up on through iCloud so is it possible to do this, ie go back to ios18?

it’s been 2 days and I have really really tried to embrace it but I just don’t at all

Thanks for that insightful message.

I will learn to appreciate how my phone heats up and drains battery when there's low signal ever since I updated to iOS 26.

Also, I just replaced the battery, so battery health is at 100% (for now at least)

The idea of searching for a discussion on your issue is to then read the discussion which will likely contain the best possible answer, rather than simply posting the question all over again. The answer will not change no matter how many times the question is asked.

No, it’s not. I accidentally updated as well. I woke up 7 am this morning in December? Dark mornings picked up the phone so there was a red dot and I did the same and now I wish I hadn’t.. because it’s draining my battery my phone is relatively new.

Everylittlebreeze wrote:

No, it’s not. I accidentally updated as well. I woke up 7 am this morning in December? Dark mornings picked up the phone so there was a red dot and I did the same and now I wish I hadn’t.. because it’s draining my battery my phone is relatively new.

It's completely normal for the battery to drain faster for a couple days immediately after an iOS update. Your phone has to work hard to reindex the millions upon millions of bytes of data. Give it a couple days for the indexing to complete.

Everylittlebreeze wrote:

No, it’s not. I accidentally updated as well. I woke up 7 am this morning in December? Dark mornings picked up the phone so there was a red dot and I did the same and now I wish I hadn’t.. because it’s draining my battery my phone is relatively new.

Review the information provided by Apple here that would apply if you just updated this morning and will have another 3-5 days before you can make any judgements. You should be experiencing battery drain, lag in the UI, and the device will be warmer than normal during that time.

About Apple software updates - Apple Support

Learn to appreciate it! Really. Learn to appreciate the cliches, tapping and noting happens!I downloaded and in two minutes I had another download for the cliches which it didn’t take care of. Apple should do better! Don’t release something unless it works! I have blocked the upgrade on all my other devices.

jvcurcuru wrote:

Learn to appreciate it! Really. Learn to appreciate the cliches, tapping and noting happens!I downloaded and in two minutes I had another download for the cliches which it didn’t take care of. Apple should do better! Don’t release something unless it works! I have blocked the upgrade on all my other devices.

Obviously, Apple should have listened to you and made sure that everything conformed to your preferences! It is terrible that they didn't do that! You should let them know:

Product Feedback - Apple