Assuming you're enrolled in the Apple public beta program, you can now grab the public beta directly on your iPhone. Just go to Settings, tap on General and select Software Updates. On that screen, tap on Beta Updates to find the iOS 26 beta.

With that done, it’s now time to download the iOS 26 beta onto your iPhone. To do this, head to Settings > General > Software Update > Beta Updates, and select the beta you want. There may be multiple options, especially if you’ve also enrolled into the developer beta program, but the one you want in this instance is ‘ iOS 26 Public Beta’.