But as great as new features are, they don't make up for bugs and instability. If you're finding the iOS 26 beta too temperamental to handle right now, you can downgrade back to iOS 18—but the process might not be painless.
That means with each update, the beta gets more and more stable. There are no guarantees when it comes to betas, but if you're going to jump on one, I recommend joining as late as possible to bypass the worst of the bugs. (Apple plans a public beta release for July.) As of this writing, iOS 26 is on it's first beta, and a developer beta, no less. It's a version Apple releases for software developers to test their apps with, and not the general pool of users who are interested in trying features out early. iOS 26 will likely never be this buggy and unstable again, and while anyone with the know-how can get their compatible iPhone running the beta, it's risky.
Where the real trouble starts is when you decide you want to uninstall the beta from your iPhone. It's possible, but it's a pain: The only way to uninstall the iOS 26 beta and downgrade to iOS 18 is to restore your iPhone to factory settings. A simple reset won't do: You need to perform a full restore to wipe everything from your device, then reinstall the latest version of iOS 18. There's no guarantee this will work, either, as you could run into any number of errors—though Apple has steps on what to do should you encounter them.
Don't uninstall the beta if you don't have a proper backup
That's why Apple recommends you back up your iPhone to a computer before installing a beta: These backups are made manually, and are not overwritten by future backups. As such, it's the much safer option for restoring when downgrading.
[Your Name] > iCloud > iCloud Backup. If the last backup was made prior to the installation, disable iCloud backups to ensure no backup is made while running iOS 26. If it did backup since running iOS 26, and you don't have another backup option, do not proceed unless you're okay with losing all of the local data not tied to your Apple Account or other accounts you have logged into your iPhone. (It's really not worth installing betas, you guys.) Unless your iPhone cannot function on iOS 26, you're better off living with the beta until things get more stable, rather than risk losing data to go back to iOS 18.
Next, plug your iPhone into your computer, then put it into recovery mode. You can do so with the following steps:
Press and release the volume down button.
Wait for the Restore option to appear on your computer, then click it. Your computer will then erase your iPhone, and automatically install the latest non-beta version of iOS. (At this time, that would be iOS 18.5.) Apple warns that this process can fail, in which case your device will exit recovery mode. If so, let the download finish, then put your iPhone back into recovery mode and try again. If you run into a specific error code when attempting to restore, locate it on Apple's support page and try to troubleshoot the issue.
Restoring your iPhone's data after uninstalling iOS 26
At this point, assuming everything went according to plan, you have a blank iPhone running the latest version of iOS 18. If you have that proper backup described above, you can restore it during the setup process.
To do so, go through the setup steps until you reach the "Transfer Your Apps & Data" page. Here, you can restore your iPhone from an iCloud backup, or a backup from your Mac or PC. Again, this backup needs to be compatible with the latest version of iOS 18 you're running. If it is, Apple will walk you through the steps to restore it. (Just make sure if you choose to restore from a Mac or PC that you connect your iPhone to the computer that contains your backup before proceeding.)
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