ZDNET Recommends uninstalling the iOS 26 beta on your iPhone if you’re experiencing issues with its performance, such as bugs and glitches. Here’s how to do it safely.
To start, ensure you have a backup of your iPhone before upgrading to iOS 26. Then, follow these steps:
1. Connect your iPhone to your Mac or PC with iTunes using a USB cable.
2. Put your iPhone in Recovery Mode by pressing the volume Up button, followed by the volume Down button, and then holding the power/side button until the Connect to Computer screen appears.
3. Follow the prompts on your computer to restore your iPhone.
Alternatively, you can use an iCloud backup if available. If you’re unsure about uninstalling the iOS 26 beta, consider waiting for its stable public release instead of downgrading to iOS 18.
Note: It’s essential to back up your device before installing a beta version of iOS, as backups made on a beta version may be incompatible with older software versions and result in lost data.
Source: https://www.zdnet.com/article/how-to-uninstall-the-ios-26-beta-on-your-iphone-and-why-you-might-want-to