Every year, Apple releases new versions of iOS and iPadOS, and most years those updates also end support for a handful of devices that are too old or too slow or otherwise incapable of running the new ...
OS 26 compatible devices include iPhone 11 to iPhone 17 and SE 2/3; XS, XR dropped. Apple update adds Liquid Glass UI and AI tools for newer models.
Since the beginning of December, Apple has been pushing iPhone users who opted to stay on iOS 18 to install iOS 26 instead.