You can download iOS 18 beta on your iPhone now. How to get it (and supported models)

You can navigate to your settings to install the iOS 18 developer beta if your device runs iOS 16.4 and is used with an Apple ID enrolled in the Apple Developer Program:

1. Go to your iPhone Settings
2. Tap on General
3. Select Software Update
4. Go to Beta Updates
5. Choose the iOS 18 Developer Beta

If you can’t see this option, go to your Settings, select Privacy & Security, and enable Developer Mode.