While we don't yet know the new iPhones Apple will be dropping this fall — though there are iPhone 17 rumors — we do know, per Apple's site, that the phones listed below will be compatible with iOS 26. Basically, if you have an iPhone that was announced in 2019 or later, you're in the clear:

The newest iPhone software release could be the last big update before Apple moves to the next-generation iOS 26. Here’s what’s in it.

As part of iOS 26's interface changes, your iPhone lock screen can take on a new look with spatial photos available as the background image for your phone and an adaptive time feature that adjusts the look of the on-screen clock to fit with the other visual elements. We go through all the iOS 26 lock screen changes.